for Journals by Title or ISSN
for Articles by Keywords
help
  Subjects -> ENGINEERING (Total: 2417 journals)
    - CHEMICAL ENGINEERING (207 journals)
    - CIVIL ENGINEERING (202 journals)
    - ELECTRICAL ENGINEERING (111 journals)
    - ENGINEERING (1267 journals)
    - ENGINEERING MECHANICS AND MATERIALS (400 journals)
    - HYDRAULIC ENGINEERING (56 journals)
    - INDUSTRIAL ENGINEERING (76 journals)
    - MECHANICAL ENGINEERING (98 journals)

ENGINEERING (1267 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 8)
3D Research     Hybrid Journal   (Followers: 21)
AAPG Bulletin     Hybrid Journal   (Followers: 8)
AASRI Procedia     Open Access   (Followers: 14)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
ACS Nano     Full-text available via subscription   (Followers: 274)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 7)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 3)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 11)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 7)
Advanced Journal of Graduate Research     Open Access  
Advanced Science     Open Access   (Followers: 5)
Advanced Science Focus     Free   (Followers: 5)
Advanced Science Letters     Full-text available via subscription   (Followers: 10)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 18)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 7)
Advances in Engineering Software     Hybrid Journal   (Followers: 27)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 17)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 13)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 21)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 22)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 29)
Advances in Operations Research     Open Access   (Followers: 12)
Advances in OptoElectronics     Open Access   (Followers: 6)
Advances in Physics Theories and Applications     Open Access   (Followers: 13)
Advances in Polymer Science     Hybrid Journal   (Followers: 43)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Remote Sensing     Open Access   (Followers: 44)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 3)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 6)
AIChE Journal     Hybrid Journal   (Followers: 35)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access   (Followers: 1)
Alexandria Engineering Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 26)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 10)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 24)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 4)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Regional Science     Hybrid Journal   (Followers: 7)
Annals of Science     Hybrid Journal   (Followers: 7)
Antarctic Science     Hybrid Journal   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 6)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 18)
Applied Clay Science     Hybrid Journal   (Followers: 6)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 11)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Network Science     Open Access   (Followers: 3)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 5)
Applied Sciences     Open Access   (Followers: 3)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 8)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 3)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 8)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Current Engineering & Maths     Open Access  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 8)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 5)
Batteries     Open Access   (Followers: 6)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 28)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 1)
BER : Motor Trade Survey     Full-text available via subscription  
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 1)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Beyond : Undergraduate Research Journal     Open Access  
Bhakti Persada : Jurnal Aplikasi IPTEKS     Open Access  
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Bilge International Journal of Science and Technology Research     Open Access  
Biofuels Engineering     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 11)
Biomedical Engineering     Hybrid Journal   (Followers: 15)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 21)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 37)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal   (Followers: 1)
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 2)
Biotechnology Progress     Hybrid Journal   (Followers: 40)
Bitlis Eren University Journal of Science and Technology     Open Access  
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 13)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 14)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal   (Followers: 2)
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 31)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 42)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 6)
Case Studies in Thermal Engineering     Open Access   (Followers: 5)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 8)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 7)
CEAS Space Journal     Hybrid Journal   (Followers: 2)
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 3)
Central European Journal of Engineering     Hybrid Journal  
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencias Holguin     Open Access   (Followers: 3)
CienciaUAT     Open Access   (Followers: 1)
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 13)
City, Culture and Society     Hybrid Journal   (Followers: 21)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Clean Air Journal     Full-text available via subscription   (Followers: 1)
Clinical Science     Full-text available via subscription   (Followers: 9)
Coal Science and Technology     Full-text available via subscription   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 6)
Coatings     Open Access   (Followers: 4)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 2)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 14)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 14)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 28)
Composite Interfaces     Hybrid Journal   (Followers: 7)
Composite Structures     Hybrid Journal   (Followers: 276)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 212)
Composites Part B : Engineering     Hybrid Journal   (Followers: 248)
Composites Science and Technology     Hybrid Journal   (Followers: 194)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access   (Followers: 1)
Computational Geosciences     Hybrid Journal   (Followers: 16)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 8)
Computer Science and Engineering     Open Access   (Followers: 19)
Computers & Geosciences     Hybrid Journal   (Followers: 31)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 8)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 5)
Computers and Geotechnics     Hybrid Journal   (Followers: 11)
Computing and Visualization in Science     Hybrid Journal   (Followers: 7)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 33)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 8)

        1 2 3 4 5 6 7 | Last

Journal Cover
Catalysis Communications
Journal Prestige (SJR): 0.929
Citation Impact (citeScore): 3
Number of Followers: 6  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1566-7367
Published by Elsevier Homepage  [3163 journals]
  • Acetoxylation of acetylene to vinyl acetate monomer over bimetallic
           Zn-Ni/AC catalysts
    • Authors: Peijie He; Xueyi Wu; Liuhua Huang; Mingyuan Zhu; Xugen Wang; Bin Dai
      Pages: 5 - 9
      Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Peijie He, Xueyi Wu, Liuhua Huang, Mingyuan Zhu, Xugen Wang, Bin Dai
      Zinc and bimetallic zinc-nickel catalysts for acetylene acetoxylation were prepared with Zn(OAc)2·2H2O and Ni(OAc)2·4H2O as precursors, and characterized by ICP-AES, BET, XPS, TEM, TPD-MS and TG. The catalytic performances of the obtained Zn-Ni/AC catalysts were tested in a fixed-bed reactor. The results indicated that the addition of nickel decreased the size of Zn(OAc)2 particles and inhibited carbon deposition on the catalyst surface; there was a synergistic effect between the two metal components, which modified the electronic properties of Zn(OAc)2 particles and modulated the catalytic adsorption of acetylene and acetic acid, thereby enhancing the activity and stability of the zinc catalysts.
      Graphical abstract image

      PubDate: 2018-04-25T00:46:50Z
      DOI: 10.1016/j.catcom.2018.02.022
      Issue No: Vol. 112 (2018)
       
  • Methoxylation on the C5 and C6 positions of quinolines with methanol
    • Abstract: Publication date: August 2018
      Source:Catalysis Communications, Volume 114
      Author(s): Guodong Wang, Junfen Han, Kai Wang, Hongshaung Li, Guiyun Duan, Chengcai Xia, Furong Li
      The C(5)H and C(6)H methoxylation of quinoline amides with methanol was presented by using PtCl2 or triethylamine as an additive. The reaction when conducted under mild conditions provides expedient access to quinoline derivatives, which are frequently found in many drug candidates.
      Graphical abstract image

      PubDate: 2018-06-23T03:03:53Z
       
  • Promotional effects of cerium modification of Cu-USY catalysts on the
           low-temperature activity of NH3-SCR
    • Abstract: Publication date: August 2018
      Source:Catalysis Communications, Volume 114
      Author(s): Jianmin Zhou, Chengwei Zhao, Jiansong Lin, Haipeng Yang, Renxian Zhou
      A series of ceria-modified Cu-USY catalysts were prepared by a co-impregnation method and tested towards the selective reduction of NOx with NH3. A 5Cu-8Ce-USY catalyst with 8 wt% Ce content showed optimum low-temperature activity, and the widest NO conversion temperature window (160–410 °C) of operation, which these features are related to the enhanced redox ability and Cu+ species concentration in the sodalite cage compared to the Cu-USY catalyst. In addition, Lewis acid sites on the surface of Cu-Ce-USY catalysts were found to play a key role for its excellent SCR performance. The ceria-modified Cu-USY catalysts with enhanced low-temperature (120–170 °C) deNOx performance make them highly promising candidates for practical applications in controlling NOx emissions.

      PubDate: 2018-06-23T03:03:53Z
       
  • Highly efficient solvent-free aerobic oxidation of ethylbenzene over
           hybrid Zn–Cr layered double hydroxide/carbon nanotubes nanocomposite
    • Abstract: Publication date: August 2018
      Source:Catalysis Communications, Volume 114
      Author(s): Yingji Zhao, Renfeng Xie, Yanjun Lin, Guoli Fan, Feng Li
      A new hybrid ZnCr layered double hydroxide/carbon nanotubes (ZnCr-LDH/CNTs) nanocomposite was fabricated and employed as a high performing and stable catalyst for aerobic oxidation of ethylbenzene (EB) into acetophenone (AP). Small-sized ZnCr-LDH nanocrystals could be highly dispersed and tightly anchored onto acid-treated CNTs, forming strong interactions between them. As-assembled ZnCr-LDH/CNTs exhibited an excellent catalytic performance with a high acetophenone selectivity of 93.7% at EB conversion of 54.2%, as well as a turnover number of 2532 mol/mol. Such unprecedented efficiency of ZnCr-LDH/CNTs originated from both highly dispersed active Cr species and strong interactions between ZnCr-LDH nanocrystals and the CNTs matrix.
      Graphical abstract image

      PubDate: 2018-06-23T03:03:53Z
       
  • Visible-light photoredox catalyzed cyclization of aryl alkynoates for the
           synthesis of trifluoromethylated coumarins
    • Abstract: Publication date: August 2018
      Source:Catalysis Communications, Volume 114
      Author(s): Mei-jie Bu, Guo-ping Lu, Chun Cai
      A strategy for the synthesis of coumarin derivatives via visible-light photoredox catalysis has been developed using fac-Ir(ppy)3 as the photocatalyst under mild conditions. Trifluoromethanesulfonyl chloride is utilized as the trifluoromethylation reagent, which is cheap and readily available. Aryl alkynoates are trifluoromethylated, then undergo a radical cyclization and a cascade ester migration to generate target products.
      Graphical abstract image

      PubDate: 2018-06-23T03:03:53Z
       
  • Oligomerization of 1-butene over carbon-supported CoOx and subsequent
           isomerization/hydroformylation to n-nonanal
    • Abstract: Publication date: Available online 20 June 2018
      Source:Catalysis Communications
      Author(s): Joseph P. Chada, Zhuoran Xu, Dongting Zhao, Rick B. Watson, Mick Brammer, Marinus Bigi, Devon C. Rosenfeld, Ive Hermans, George W. Huber
      A two-step process was demonstrated for the conversion of 1-butene to n-nonanal with an overall reaction selectivity of 70.8%. The process consists of a dimerization step over a heterogeneous carbon-supported cobalt oxide catalyst to a mixture of oligomers, consisting primarily of internal linear octenes. After product distillation, the olefinic mixture was converted to C9 aldehydes with a normal/isomeric (N/I) ratio of 3.8 over a homogeneous Rh/BIPHEPHOS catalyst. This work demonstrates a new route to produce linear aldehydes from light olefins.
      Graphical abstract image

      PubDate: 2018-06-23T03:03:53Z
       
  • Effect of halides on nanoporous Zn-based catalysts for highly efficient
           electroreduction of CO2 to CO
    • Abstract: Publication date: Available online 19 June 2018
      Source:Catalysis Communications
      Author(s): Dang Le Tri Nguyen, Michael Shincheon Jee, Da Hye Won, Hyung-Suk Oh, Byoung Koun Min, Yun Jeong Hwang
      The effects of halide ions (F−, Cl−, Br−, or I−) on nanoporous Zn-based electrocatalysts were assessed. All catalysts in the presence of halides exhibited high electrocatalytic performances of CO2 reduction reaction (CO2RR) and efficient suppression of hydrogen evolution reaction (HER) with a maximum Faradaic efficiency of up to 97%. The increasing adsorption strength from F− to I− is proposed to form more porous structures and higher oxidized Zn species, thus facilitating the protonation of CO2 and stabilizing the adsorbed intermediates induced by charge donation from the adsorbed halides on Zn surface to CO2, enhance CO2RR and simultaneously suppress HER.
      Graphical abstract image

      PubDate: 2018-06-23T03:03:53Z
       
  • Pt/TiO2 granular photocatalysts for hydrogen production from aqueous
           glycerol solution: Durability against seawater constituents and dissolved
           oxygen
    • Abstract: Publication date: Available online 19 June 2018
      Source:Catalysis Communications
      Author(s): Hiroaki Sakurai, Masato Kiuchi, Tetsuro Jin
      We examined the impact of seawater constituents and dissolved oxygen (DO) on granular Pt/TiO2 photocatalytic reactions producing hydrogen from water with glycerol as a sacrificial agent. Hydrogen production halved in seawater compared to pure water, mainly due to flocculation of the granules, and activity recovered by deflocculation and/or lowering the Na+ concentrations. The activity of the settled granular photocatalyst was higher than that of the suspended powder photocatalyst under anoxic conditions. The decrease in activity was small up to the DO value of pure oxygen bubbling, which shows the effective inhibition of oxygen reduction and thermal hydrogen oxidation.

      PubDate: 2018-06-23T03:03:53Z
       
  • Photocatalytic mineralization of carbendazim pesticide by a visible light
           active novel type-II Bi2S3/BiFeO3 heterojunction photocatalyst
    • Abstract: Publication date: Available online 19 June 2018
      Source:Catalysis Communications
      Author(s): Yagna Prakash Bhoi, Amit K. Nayak, Somesh K. Gouda, B.G. Mishra
      In this study, an efficient photocatalytic route is developed for degradation of carbendazim fungicide under visible light irradiation using Bi2S3/BiFeO3 heterojunction materials as photocatalyst. The heterojunction system prepared by a two-step process contains rhombohedral BiFeO3 and orthorhombic Bi2S3 as crystalline phases. Morphologically, the Bi2S3/BiFeO3 materials contain BiFeO3 nanoplates and Bi2S3 nanorods in close microscopic contact. The Bi2S3/BiFeO3 materials exhibited improved visible light absorption, enhanced charge carrier separation and efficient photocatalytic activity achieving 96% degradation within 2 h of reaction. The mechanistic pathway for carbendazim degradation has been elucidated using GC-Mass analysis and radical scavenger experiments.
      Graphical abstract image

      PubDate: 2018-06-23T03:03:53Z
       
  • Coumarin-surfactant modified polyoxometalate as highly efficient catalysts
           for the selective oxidation of benzyl alcohol with air
    • Abstract: Publication date: August 2018
      Source:Catalysis Communications, Volume 114
      Author(s): Qian Xu, Shuyi Li, M. Katherine Banks, Weijian Xu, Ruoxi Wu
      Two novel polyoxometalate-based catalysts were prepared by modifying Keggin POM H4PMo11VO40 with a coumarin-surfactant through electrostatic interactions. The results indicate that (Coumarin)3HPMo11VO40 exhibits excellent catalytic activity in the selective oxidation of benzyl alcohol using air as the oxidant, where the conversion of benzyl alcohol is 99%, and the selectivity for benzaldehyde is 100%. The excellent catalytic performance can be attributed to π-π* conjugate effects with the reactant, and the structural characteristics of the large BET specific surface area and pore size of the catalyst.

      PubDate: 2018-06-10T05:19:20Z
       
  • Laccase-catalyzed in situ generation and regeneration of
           N-phenyltriazolinedione for the aerobic oxidative homo-coupling of thiols
           to disulfides
    • Abstract: Publication date: Available online 9 June 2018
      Source:Catalysis Communications
      Author(s): Donya Khaledian, Amin Rostami, Seyed Amir Zarei
      The first report on aerobic in situ generation and regeneration of N-phenyltriazolinedione, a valuable oxidizing agent, from a catalytic amount of N-phenyl urazole in the presence of a laccase enzyme is presented. The application of a 4-phenyl urazole/Laccase/O2 as a new cooperative catalytic oxidation system is reported for a transition-metal-free and halogen free oxidative homo-coupling reaction of structurally diverse thiols to their corresponding disulfides with good to excellent yields in a phosphate buffer solution under mild reaction conditions.
      Graphical abstract image

      PubDate: 2018-06-10T05:19:20Z
       
  • Catalytic conversion of furfural-acetone condensation products into
           bio-derived C8 linear alcohols over NiCu/Al-SBA-15
    • Abstract: Publication date: Available online 8 June 2018
      Source:Catalysis Communications
      Author(s): Rubén Ramos, José M. Hidalgo, Michael Göpel, Zdeněk Tišler, Francine Bertella, Agustín Martínez, Oleg Kikhtyanin, David Kubička
      The production of C8 linear diols from a furfural-acetone condensation product has been achieved for the first time using a non-noble metal based catalyst. In particular, SBA-15 supported NiCu bimetallic catalyst showed the best hydrogenating activity reaching an outstanding yield (ca. 63%) of the fully saturated product. The incorporation of acidity by the preparation of NiCu/Al-SBA-15 resulted in the promotion of ring-opening steps, which led to a remarkable yield of C8 linear diols (28%). These results establish a competitive catalytic route for the production of bio-based diols over cost-efficient 3d transition metal-based catalysts.
      Graphical abstract image

      PubDate: 2018-06-10T05:19:20Z
       
  • Catalytic behavior of Ru nanoparticles supported on carbon fibers for the
           ethanol steam reforming reaction
    • Abstract: Publication date: August 2018
      Source:Catalysis Communications, Volume 114
      Author(s): María Laura Bosko, Nicolás Ferreira, Antonella Catena, M. Sergio Moreno, John F. Múnera, Laura Cornaglia
      Ru catalysts on carbon fibers were prepared by electroless deposition, with 0.6 wt% Ru loading. The reduced and used catalysts were characterized by different techniques in order to analyze oxidation states and surface composition, the metallic content at volumetric level, and particle size. These solids were evaluated for the production of hydrogen via ethanol steam reforming at different gas hour space velocities (GHSV) at 723 K. Space velocity significantly influenced the distribution of products favoring the formation of acetaldehyde at short contact times while, for longer times, it was possible to obtain a hydrogen rich stream, free of oxygenate compounds.
      Graphical abstract image

      PubDate: 2018-06-07T05:16:15Z
       
  • A new nickel substituted silicotungstate catalyst for efficient
           visible-light-induced hydrogen production from water splitting
    • Abstract: Publication date: Available online 6 June 2018
      Source:Catalysis Communications
      Author(s): Weiming Wu, Xiao-Yuan Wu, Can-Zhong Lu
      A new nickel substituted silicotungstate ([Ni4(H2O)2(SiW10O38)2]8−, Ni 2 SiW 10 ) was builded by NiCl2 and Na10SiW9O34 under mild conditions. It was used as a carbon-free homogeneous catalyst for the efficient visible-light-induced hydrogen production from water splitting with fluorescein sodium and triethanolamine as a photosensitizer and sacrificial electron donor, respectively. The initial rate of the H2 evolution was 239 μmol h−1, corresponding to a turnover frequency of 28 h−1. Further results suggested that a reductive process was dominant in the present system for fluorescein sodium, and the production of H2 came from water splitting.
      Graphical abstract image

      PubDate: 2018-06-07T05:16:15Z
       
  • Palladium nanoparticles supported on carbon nanoglobules as efficient
           catalysts for obtaining benzocaine via selective hydrogenation of ethyl
           4-nitrobenzoate
    • Abstract: Publication date: Available online 6 June 2018
      Source:Catalysis Communications
      Author(s): Roman M. Mironenko, Olga B. Belskaya, Tatiana I. Gulyaeva, Mikhail V. Trenikhin, Vladimir A. Likholobov
      The palladium catalysts prepared using carbon nanoglobules (CNGs) as the support and containing no more than 2 wt% Pd were shown to be highly effective for the liquid-phase hydrogenation of ethyl 4-nitrobenzoate under mild conditions. Regardless of the kind of CNGs and the catalyst preparation method, the most of the Pd/CNGs catalysts allow achieving a complete conversion of substrate giving benzocaine in a 100% yield. The Pd/CNGs catalyst is easily recycled many times without loss of its catalytic performance. The results obtained may be useful for the development of effective Pd/C catalysts for chemoselective hydrogenation of various nitroarenes.
      Graphical abstract image

      PubDate: 2018-06-07T05:16:15Z
       
  • Polyacrylonitrile beads supported Pd-based nanoparticles as superior
           catalysts for dehydrogenation of formic acid and reduction of organic dyes
           
    • Abstract: Publication date: Available online 5 June 2018
      Source:Catalysis Communications
      Author(s): Zhenzhen Wang, Haoyang Zhang, Lin Li, Songsong Miao, Shujie Wu, Xiufeng Hao, Wenxiang Zhang, Mingjun Jia
      Polyacrylonitrile (PAN) beads supported Pd nanoparticles (NPs) exhibit excellent catalytic performance for aqueous-phase formic acid (FA) dehydrogenation. Doping suitable content of Co or Fe species could further enhance the catalytic activity of the PAN supported Pd-based NPs catalysts. Abundant -CN groups existed on the surface of PAN beads are beneficial to immobilizing Pd NPs, and may also act as proton scavengers to provide a suitable basic environment for activating FA molecular. Notably, the composition-optimized catalysts can also efficiently reduce the low concentration of organic dyes (methylene blue and rhodamine B) using FA as hydrogen source under ambient conditions.
      Graphical abstract image

      PubDate: 2018-06-07T05:16:15Z
       
  • Mo doping as an effective strategy to boost low temperature NH3-SCR
           performance of CeO2/TiO2 catalysts
    • Abstract: Publication date: August 2018
      Source:Catalysis Communications, Volume 114
      Author(s): Lulu Li, Wei Tan, Xiaoqian Wei, Zhongxuan Fan, Annai Liu, Kai Guo, Kaili Ma, Shuohan Yu, Chengyan Ge, Changjin Tang, Lin Dong
      A novel CeO2/TiO2-MoO3 (Ce/TM) catalyst was synthesized by using of Mo as a bulk dopant to boost the NH3-SCR performance of CeO2/TiO2 catalyst. It displayed 100% NO conversion at 200–350 °C under 60,000 mlg−1 h−1 and high tolerance to H2O and SO2 at 250 °C. Characterization results manifested that the doping of Mo not only resulted in more Brønsted acid and Lewis acid sites formed on the Ce/TM surface, but also increased the specific surface area and redox ability of the catalyst, all of which account for the enhanced NH3-SCR activity.
      Graphical abstract image

      PubDate: 2018-06-04T12:54:39Z
       
  • Biocatalytic conversion of 5-hydroxymethylfurfural: Synthesis of
           2,5-bis(hydroxymethyl)furan and 5-(hydroxymethyl)furfurylamine
    • Abstract: Publication date: August 2018
      Source:Catalysis Communications, Volume 114
      Author(s): Antonella Petri, Giulia Masia, Oreste Piccolo
      Two different green biocatalytic methods were investigated for the transformation of 5-hydroxymethylfurfural (HMF) to valuable disubstituted furan derivatives. 2,5-bis(hydroxymethyl) furan (BHMF) was obtained by biocatalytic reduction using lyophilized plant tissues. 5-(hydroxymethyl)furfurylamine (HMFA) was synthesized by amination transfer reaction catalysed by immobilized transaminase enzymes. By choosing suitable reaction conditions both products were obtained with high yields in water as reaction medium, at room temperature or 50 °C within a reaction time of 48 and 24 h. The studied protocols represent environmentally benign and promising green catalytic processes, generating less waste than other synthetic approaches.

      PubDate: 2018-06-04T12:54:39Z
       
  • Synthesis of ZSM-5 catalysts with tunable mesoporosity by
           ultrasound-assisted method: A highly stable catalyst for methanol to
           propylene
    • Abstract: Publication date: Available online 2 June 2018
      Source:Catalysis Communications
      Author(s): Sishuang Zhuang, Zhijie Hu, Liang Huang, Feng Qin, Zhen Huang, Chao Sun, Wei Shen, Hualong Xu
      A series of ZSM-5 zeolites with tunable mesoporosity were synthesized by a facile ultrasound-assisted method. XRD, FT-IR and NH3-TPD results exhibited that as-synthesized ZSM-5 kept the MFI structure as well as the original acidity. Traced by TEM techniques, the crystallization process, especially the state of initial amorphous gel, was found notably affected by the ultrasound treatment by breaking the weak bonds, which led to formation of mesopores in crystals. The ZSM-5 catalysts with abundant mesoprores inhibited coking significantly and showed high catalytic stability for methanol to propylene reaction. The Z5-us-60 catalyst exhibited the highest catalytic stability for >600 h at a high WHSV of 4.0 h−1.
      Graphical abstract image

      PubDate: 2018-06-04T12:54:39Z
       
  • One-step synthesis of stereo-pure l,l lactide from l-lactic acid
    • Abstract: Publication date: Available online 2 June 2018
      Source:Catalysis Communications
      Author(s): Marzieh Ghadamyari, Somboon Chaemchuen, Kui Zhou, Michiel Dusselier, Bert F. Sels, Bibimaryam Mousavi, Francis Verpoort
      Poly (lactic acid) (PLA) is extensively used as an eco-friendly compound for many applications. The synthesis of stereo-pure lactide, specifically l,l-lactide which is the most desired isomer for the synthesis of high-quality PLA is very important. In this work, various materials including MOFs and simple bases have been applied as catalysts for the Lactide synthesis. Herein we report the one-step synthesis of l,l-lactide with high selectivity and yield (99%) in the absence of racemization by applying a cost-effective Cs2CO3 catalyst. The novel described procedure is even expected to be very efficient for industrial applications.
      Graphical abstract image

      PubDate: 2018-06-04T12:54:39Z
       
  • Improving the catalytic performance of TS-1 through Zn(AC)2 modification
    • Abstract: Publication date: August 2018
      Source:Catalysis Communications, Volume 114
      Author(s): Xiangqing Fang, Lizhi Wu, Yunkai Yu, Le Sun, Yueming Liu
      A facile strategy is carried out to improve the performance of TS-1 via implanting heteroatom Zn in alkaline conditions. The Zn modified TS-1 exhibits an excellent activity and selectivity in the alkene epoxidation. Combined with various investigations, such a good performance mainly is attributed to the promoted electropositivity near the Ti sites and the more relaxed structure near Ti sites in TS-1-Zn, which are beneficial to facilitate the active intermediate formation. The better selectivity of epoxides could mainly be ascribed to the neutralization of acid sites with Zn species. And the strategy is successfully applied to Ti-MWW.
      Graphical abstract image

      PubDate: 2018-06-01T09:48:54Z
       
  • The studies on the chemoenzymatic synthesis of 2-benzyl-3-butenoic acid
    • Abstract: Publication date: August 2018
      Source:Catalysis Communications, Volume 114
      Author(s): Filip Borys, Daniel Paprocki, Dominik Koszelewski, Ryszard Ostaszewski
      The studies on the chemoenzymatic synthesis of 2-benzyl-3-butenoic acid 3 were performed. The alkylation of dienolates derived from the crotonic and vinylacetic acids with different types of alkylating agents was examined. In all cases the inseparable mixture of isomeric acids 3 and 4 were obtained. Chemoselective enzymatic esterification of those mixtures provides ester 6 in 86% yield as a single product without double bond isomerization. None common method can be used for its hydrolysis since under basic conditions only isomeric acid 5 is formed. To overcome this limitation enzyme catalysed hydrolysis process was design. This protocol afforded isomerically pure acid 3 in 98% yield.

      PubDate: 2018-06-01T09:48:54Z
       
  • Single-step rapid aerosol synthesis of N-doped TiO2 for enhanced visible
           light photocatalytic activity
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Panagiotis G. Smirniotis, Thirupathi Boningari, Devaiah Damma, Siva Nagi Reddy Inturi
      For the first time, nitrogen-doped TiO2 was successfully synthesized by a novel single-step flame aerosol method. Our XPS and EDX results illustrate that the nitrogen was effectively doped into the crystal lattice of TiO2 in our as-synthesized N-TiO2 catalysts predominantly in the form of interstitial nitrogen (Ti−O−N) rather than substitutional nitrogen (Ti−N). The shift of the (101) plane anatase diffraction peaks to lower angles in our N-doped TiO2 catalysts compared to pristine TiO2 revealed the distortion and strain in the crystal lattice instigated by the incorporation of the nitrogen atoms. The growth or expansion of crystal lattice can be attributed to the larger atomic radius of respective nitrogen atoms (r = 1.71 Å) compared to oxygen (r = 1.40 Å). Our single-step rapid aerosol synthesis method directs the nitrogen atoms mainly occupy interstitial positions in TiO2 lattice. This occurrence narrows the band gap of TiO2 (from 3.12 to ~2.51 eV) in our N-doped TiO2. The lowering of band-gap energy for our flame-made N-doped TiO2 materials indicates that the nitrogen doping in TiO2 by aerosol method is highly effective in achieving a red-shift on adsorption to potentially make use of the energy of visible light. The presence of high amount interstitial nitrogen would modify the band structure and suppress the recombination efficiency of the photogenerated electron–hole pairs, resulting in enriched photocatalytic ability of TiO2 under solar environment or visible irradiation. The incorporation of nitrogen atoms into the lattice structure of TiO2 modifies the electronic band structure of titania, which leads to a new mid-gap energy state N 2p band formed above O 2p valance band. The photocatalytic degradation of phenol as a probe reaction was used to evaluate the photocatalytic properties of the as-synthesized N-doped materials under visible light.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Enhanced activity of TiO2 by concentrating light for photoreduction of CO2
           with H2O to CH4
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Dong Li, Yinfei Chen, Stéphane Abanades, Zekai Zhang
      Concentrating light technology is used to improve photoreduction of CO2 to CH4 reaction on semiconductor catalysts such as TiO2. The catalysts were prepared by anodization method and characterized by XRD, SEM, XPS and photoillumiation. The results showed that the CH4 yield rate could be raised from 0.70 μmol g−1 h−1 to 20.67 μmol g−1 h−1 under concentrating light, and it could be further increased to 28.49 μmol g−1 h−1 after pretreatment in the air. It is inferred that the concentrating light increases CO2 conversion not only by heightening light intensity, but also by improving the surface properties of the catalyst.

      PubDate: 2018-05-29T09:46:40Z
       
  • CuAg nanoparticles immobilized on biomass carbon nanospheres for
           high-efficiency hydrogen production from formaldehyde
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Tao Feng, Xu-Feng Meng, Shu-Tao Gao, Cheng Feng, Ning-Zhao Shang, Chun Wang
      A low-cost and high-efficient catalyst (denoted as CuAg/BC) was fabricated by immobilizing Cu-Ag bimetal on green and renewable biomass carbon nanospheres derived from sucrose for the first time. The prepared CuAg/BC catalyst exhibited high catalytic activity and stability toward the dehydrogenation of formaldehyde at 30 °C. The rate of H2 generation can reach 306.7 mL min−1 g catalys −1, which is among the highest values reported so far. The superior catalytic performance is derived from that the synergistic effect between Cu and Ag nanoparticles, and the relatively small size of CuAg nanoparticles greatly increased the utilization efficiency of the metals.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Synergistic effect between Ag and Mn3O4 in the gas phase oxidation of
           alcohols
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Kun Liu, Tao Qin, Yongbin Sun, Chao Hou, Xiaoqun Cao, Shoujun Jiang
      Ag2Mn5/SiC catalyst is simply obtained by in-situ reaction-induced of their corresponding nitrate compounds onto SiC support, which exhibits excellent catalytic activity and stability in the gas phase oxidation of alcohols (94% conversion of benzyl alcohol and 98% selectivity of benzaldehyde). The catalytic activity could maintain at least 300 h after four regenerations due to the formation of highly active Ag0-Mn3O4 species. XRD and XPS indicate that active Ag0-Mn3O4 species is formed from Ag2O and MnO2 in the reaction conditions. The synergistic effect between 34 nm Ag nanoparticles and 5.5 nm Mn3O4 nanoparticles in alcohol oxidation reaction is prominent, which is testified by HRTEM and three-step experiment.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Nanoscale center-hollowed hexagon MnCo2O4 spinel catalyzed aerobic
           oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Shuang Zhang, Xiaozhu Sun, Zaihang Zheng, Long Zhang
      A series of bimetallic Mn-Co-O catalysts were synthesized by a simple hydrothermal method, and the catalytic performance was evaluated. Among these catalysts, center-hollowed hexagon MnCo2O4 exhibited excellent catalytic effect in aerobic oxidation of 5-hydroxymethylfurfural (5-HMF) to 2,5-furandicarboxylic acid (FDCA). A 99.5% 5-HMF conversion and 70.9% FDCA yield can be obtained under molecular oxygen and weak base condition. The efficient catalytic performance was attributed to the Mn3+ ions on the surface of MnCo2O4 catalyst, and its high oxygen mobility and reducibility. Furthermore, this simple synthesis process of non-precious metal catalyst is beneficial to the production of FDCA.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Pd/UiO-66(Hf): A highly efficient heterogeneous catalyst for the
           hydrogenation of 2,3,5-trimethylbenzoquinone
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Xiaoxiong Cai, Jianping Pan, Gaomei Tu, Yanghe Fu, Fumin Zhang, Weidong Zhu
      The conversion of 2,3,5-trimethylbenzoquinone (TMBQ) to 2,3,5-trimethylhydroquinone is regarded as one of the most important reactions for the production of vitamin E. Here, we report on a Hf-based metal–organic framework (MOF), UiO-66(Hf), with supported palladium nanoparticles as a highly active, selective, and recyclable catalyst for the direct hydrogenation of TMBQ with H2 under mild reaction conditions. The developed Pd/UiO-66(Hf) catalyst exhibited a marked increase in activity compared with its Pd/UiO-66(Zr) counterpart and conventional Pd/C catalysts. Its excellent catalytic performance is ascribed to the large number of acid sites in the UiO-66(Hf) framework, which promote hydrogenation.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Ag1Pd1-rGO nanocomposite as recyclable catalyst for CDC reactions of
           2-arylpyridines with aldehydes
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Qiyan Hu, Xiaowang Liu, Fei Huang, Feifan Wang, Qian Li, Wu Zhang
      Ag1Pd1 nanoparticle-reduced graphene oxide (Ag1Pd1-rGO) nanocomposite was used as an efficient catalyst for the synthesis of aromatic ketones via cross dehydrogenative coupling (CDC) reactions of 2-arylpyridines with aldehydes. The catalyst can be reused for 5 cycles without significantly losing its catalytic activity. On the basis of the obtained experimental evidence, we proposed a possible mechanism for the heterogeneous catalysis. We find that the supported catalysts exhibit a set of benefits, including extraordinarily catalytic activity, high reusability and remarkable tolerance of a variety of substrates.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • N2O-assisted methanol selective oxidation to formaldehyde on cobalt oxide
           catalysts derived from layered double hydroxides
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Oséas S. Santos, Artur J.S. Mascarenhas, Heloysa M.C. Andrade
      Cobalt-magnesium-aluminum oxides derived from layered double hydroxides were used as catalysts for the conversion of methanol to formaldehyde in the presence of nitrous oxide. The catalysts were characterized by XRD, FTIR, UV–vis DRS, TPR-H2, NH3- and CO2-TPD and N2 adsorption. 100% methanol conversion and 91% selectivity to formaldehyde were simultaneously obtained with 100% N2O conversion at 440 °C over a Co,Mg,Al-mixed oxide catalyst. Higher hydrogen yields and lower CO and CO2 yields were obtained than when air was used as oxidizing agent, under the same conditions. These findings suggest that the reaction occurs on a combination of redox and basic catalytic sites.

      PubDate: 2018-05-29T09:46:40Z
       
  • Plasma-assisted oxidation of toluene over Fe/zeolite catalyst in DBD
           reactor using adsorption/desorption system
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Ji Su Youn, Jongyoon Bae, Sunyoung Park, Yong-Ki Park
      Fe/ZSM-5 and Fe/Beta catalysts were applied to the oxidation of toluene in the DBD plasma-catalyst hybrid system using two-step adsorption/desorption process. Desorption and oxidation activity of the adsorbed toluene was affected significantly by both catalyst properties and process variables. Pore volume, Fe content, and Si/Al ratio of the catalyst influenced the formation of products by changing the interaction between the catalyst and the plasma species. The desorption process time was also controlled by varying the concentration of O3 and the air flow rate. Consequently, these results could contribute to advance the plasma-catalyst system with an optimal VOCs oxidation efficiency.

      PubDate: 2018-05-29T09:46:40Z
       
  • Effect of Ag loading on CO2-to-methanol hydrogenation over Ag/CuO/ZrO2
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Shohei Tada, Shigeo Satokawa
      The effect of Ag loading (wt%) of Ag/CuO/ZrO2 catalysts for the CO2 hydrogenation to methanol was investigated. The addition of a small amount of Ag (≤1 wt%) to CuO/ZrO2 did not change the turnover frequency of methanol production per exposed Cu sites (TOF methanol) but increased the selectivity towards methanol due to a synergy developed between Cu and Ag, which was supported by H2-TPR studies.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Single-phase SO2-resistant to poisoning Co/Mn-MOF-74 catalysts for NH3-SCR
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Haoxi Jiang, Ying Niu, Qianyun Wang, Yifei Chen, Minhua Zhang
      Single-phase Co/Mn-MOF-74 solid materials were synthesized successfully via the hydrothermal method. The effect of Co/Mn atom ratio on the structure of Co/Mn-MOF-74 solids and their catalytic activity for low-temperature NH3-SCR of NOx were investigated. Very high NO conversion values (>96.0%) at 180–240 °C were obtained using the Mn0.66Co0.34-MOF-74 chemical composition (optimal content of Co). Furthermore, Mn0.66Co0.34-MOF-74 showed outstanding resistance to SO2 poisoning and the incorporation of Co was shown to cause the weakening of the SO2 adsorption strength on the catalyst surface, thus to enhance catalyst's SO2 resistance to poisoning. These features were probed by in situ DRIFTS and catalytic performance studies. The present work suggests that Mn0.66Co0.34-MOF-74 could be likely considered as a prospective industrial NH3-SCR NOx control catalyst.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Green routes for the synthesis of hierarchical HZSM-5 zeolites with low
           SiO2/Al2O3 ratios for enhanced catalytic performance
    • Abstract: Publication date: 10 July 2018
      Source:Catalysis Communications, Volume 113
      Author(s): Yunhao Zang, Xinfa Dong, Dan Ping, Jianming Geng, Haifeng Dang
      In the present work, hierarchical HZSM-5 zeolites with SiO2/Al2O3 ratios of low to 30 are synthesized via a modified steam-assisted crystallization (SAC) process without using sodium hydroxide. The results showed that sucrose is an effective template for the formation of hierarchical HZSM-5 zeolites, and possessed large meso/macroporous volume of >0.32 cm3 g−1. The results also showed that the synthesized hierarchical HZSM-5 zeolites exhibited better catalytic stability than microporous HZSM-5 in dimethyl ether steam reforming (DME SR).
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Mechanistic investigation of NH3 oxidation over V-0.5Ce(SO4)2/Ti NH3-SCR
           catalyst
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Wenshuo Hu, Shuo Zhang, Qi Xin, Renzhi Zou, Chenghang Zheng, Xiang Gao, Kefa Cen
      NH3 oxidation over V-0.5Ce(SO4)2/Ti catalyst used for NH3-SCR was investigated and compared to that occurred over a commercial V-W/Ti catalyst. It was found that much more significant NH3 oxidation into N2 and N2O occurs over V-0.5Ce(SO4)2/Ti than commercial V-W/Ti catalyst at high temperatures (>300 °C). According to the kinetics and characterization results obtained, stronger surface redox properties and a relatively higher concentration of polymerized vanadates present on V-0.5Ce(SO4)2/Ti should contribute to its higher NH3 conversion values. In-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies suggested the formation of -NH imido species, based on which a successive NH3 dehydrogenation-like mechanism is proposed, which consistently explains well the experimental observations.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Synthesis of hierarchical ZSM-5 zeolites with CTAB-containing seed
           silicalite-1 and its catalytic performance in methanol to propylene
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Hengbao Chen, Yaquan Wang, Chao Sun, Xiao Wang, Cui Wang
      Hierarchical ZSM-5 zeolites were synthesized with cetyltrimethylammonium bromide (CTAB) containing silicalite-1 (S-1) as seed. The characterization results revealed that the CTAB/SiO2 ratio of 0.005–0.1 in S-1 created abundant intercrystal mesopores in ZSM-5 zeolites and resulted in less strong and weaker acid sites. The hierarchical ZSM-5 had a comparable catalytic performance in methanol to propylene (MTP) reaction with the zeolite synthesized by adding S-1 and CTAB directly in the precursor form as reported in the literature. However, in the present proposed method, the use of CTAB was greatly reduced. The very low-cost and facile method developed in this work is expected to be feasible for the synthesis of other zeolites.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Catalytic ozonation of paracetamol on zeolite A: Non-radical mechanism
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Amir Ikhlaq, Saba Waheed, Khurram Saleem Joya, Mosin Kazmi
      This study intends to develop removal mechanism of paracetamol during the catalytic ozonation on zeolite4A (Z4A). In order to understand the mechanism on Z4A, degradation of paracetamol, removal of Kjeldhal nitrogen, production of superoxide ion radical and the effect of hydroxyl radical scavenger was studied. The results obtained indicate that, decomposition of paracetamol leads to the decrease in Kjeldhal nitrogen content at considerably higher levels in the case of Z4A/O3 process. The results further revealed that Z4A do not promote the decomposition of ozone leading to the production of superoxide ion radical and hydroxyl radicals. It is therefore, suggested that ozonation process of paracetamol in the presence of Z4A follows a non-radical mechanism.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Rh-catalyzed selective synthesis of
           1,5-dimethylhexahydro-1H-inden-4(2H)-one via hydroformylation of
           (R)-carvone
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Sachin S. Bhagade, Bhalchandra M. Bhanage
      This work reports domino hydroformylation, hydrogenation and intramolecular keto-aldol condensation reactions for the selective synthesis of 1,5-dimethylhexahydro-1H-inden-4(2H)-one obtained from (R)-carvone and dihydrocarvone under homogeneous hydroformylation condition. The synthesis of the desired product was achieved by using conventional rhodium/1,3-bis(diphenylphosphino)propane (Rh/dppp) catalyst and PPTS (pyridinium p-toluenesulfonate) as an acidic co-catalyst. The reaction conditions were optimized with respect to various reaction parameters like time, temperature, synthesis gas (CO/H2) pressure, solvents, catalyst and co-catalyst loading. The experimental results showed that less planner carbon backbone in dihydrocarvone increases the steric hindrance around the reaction site and responsible for the reactivity difference between (R)-carvone and dihydrocarvone.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Lanthanide aryloxides catalyzed hydroboration of aldehydes and ketones
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Zhangye Zhu, Ping Dai, Zhenjie Wu, Mingqiang Xue, Yingming Yao, Qi Shen, Xiaoguang Bao
      The lanthanide aryloxides Ln(OAr)3(THF)2 (Ar = Ar1 = 2,6-tBu2-4-MeC6H2, Ln = Yb (1), Y (2); Ar = Ar2 = 2,6-iPr2C6H3, Ln = Y (3); Ar = Ar3 = 2,6-Me2C6H3, Ln = Y (4); Ar = Ar1, Ln = Sm (5), Nd (6)) could be served as highly efficient catalysts for the hydroboration of aldehydes and ketones with good functional group tolerance and excellent chemoselectivity. Computational studies were carried out to probe a feasible mechanism of the Ln-aryloxides catalyzed hydroboration of aldehydes/ketones.

      PubDate: 2018-05-29T09:46:40Z
       
  • The effects of Cr addition in HZSM-5 on its structure, physicochemical and
           catalytic properties for methyl mercaptan abatement
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Dedong He, Jie Yu, Yi Mei, Jiangping Liu, Yutong Zhao, Shuang Yang, Xiaohua Cao, Sufang He, Yongming Luo
      HZSM-5 and Cr/HZSM-5 solids were prepared and tested as potentially appropriate catalytic materials for CH3SH abatement for the first time. The effect of Cr loading on the physicochemical properties of HZSM-5 and its catalytic activity in CH3SH conversion and its products of decomposition were investigated and discussed. It was found that Cr/HZSM-5 is much more active than pure HZSM-5, where CH3SH can be completely converted at 450 °C as opposed to pure HZSM-5 (600 °C). However, an excessive loading of Cr species caused active Cr species not to be stabilized on the HZSM-5 zeolite support, resulting in no improvement of catalytic activity with increasing Cr loading.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Effect of the morphology on the vapor phase benzene catalytic
           hydrogenation over Pd/CeO2 catalyst
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Tao Li, Deping Xia, Guilin Zhou, Hongmei Xie, Zhaojie Jiao, Xianming Zhang
      CeO2 nanorods and nanocubes, which were used as supports to Pd (3.0 wt.%)/CeO2 catalysts, which were prepared by hydrothermal method. TEM, HRTEM, XRD, and H2-TPD were used to study the physic-chemical properties of the Pd/CeO2 catalysts. The Pd/CeO2 catalysts were applied to investigate the vapor phase benzene catalytic hydrogenation reaction under atmospheric pressure at the temperature of 100–200 °C. Results show that the Pd/CeO2 catalysts exhibit morphology-dependent catalytic activity. The Pd/CeO2 nanorod catalyst (PC100) has a superior vapor phase benzene catalytic hydrogenation performance. The benzene catalytic hydrogenation conversion and cyclohexane selectivity are 96.4% and 100% at 200 °C, respectively.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • The synthesis of N, S-codoped ordered mesoporous carbon as an efficient
           metal-free catalyst for selective oxidation of arylalkanes
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Kun Li, Shanshan Jie, Yuan Li, Xiu Lin, Zhigang Liu
      The N, S-codoped mesoporous carbon catalysts are prepared with a template method by using SBA-15 as the hard template, and phenanthroline and KSCN as the nitrogen and sulfur precursors. The catalyst calcined at 900 °C with relatively high specific surface areas and uniform pore sizes displays the highest catalytic performance among the obtained catalysts for selective oxidation of ethylbenzene, which is attributed to the unique architectures and the synergistic effect of pyridinic-N, graphitic-N, and thiophene-S. The excellent catalytic performance and facile preparation process enable the catalyst to be a promising metal-free substitute for selective oxidation of arylalkanes.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • A dual-functional MnO2/La0.6Sr0.4MnO3 composite catalyst: high-efficiency
           for elemental mercury oxidation in flue gas
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Yu Wang, Wenzhe Si, Yue Peng, Dong Wang, Junhua Li
      A dual-functional MnO2/La0.6Sr0.4MnO3 composite catalyst was prepared and tested for the oxidation of elemental mercury (Hg0) present in the coal-derived flue gas. The thus derived Hg2+ can then be removed from the flue gas via current pollution control devices. The MnO2 appears as the active component for the oxidation of elemental mercury, whereas the superior magnetic property of La0.6Sr0.4MnO3 catalytic component makes the catalyst recoverable from the fly-ash mixture. The Hg0 oxidation efficiency was found larger than 80% in the temperature range of 150–300 °C and at a GHSV of 120,000 mL/ (g h), whereas the catalytic efficiency could be further increased to >95% in the presence of 5 ppm HCl in the flue gas.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Biomass carbon modified Z-scheme g-C3N4/Co3O4 heterojunction with enhanced
           visible-light photocatalytic activity
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Xiaoxu Zhao, Ziyang Lu, Rong Ji, Menghan Zhang, Chengwu Yi, Yongsheng Yan
      A novel biomass carbon (BC) modified Z-scheme g-C3N4/Co3O4 heterojunction photocatalyst (BC/g-C3N4/Co3O4) has been constructed via a facile approach. In addition, various kinds of characterization methods, including TEM, XPS, UV–vis DRS, VSM, photoluminescence spectra, photocurrent response, electrochemical impedance spectroscopy, etc. are applied to investigate the morphology structure, optical property, magnetic properties and electronic properties of BC/g-C3N4/Co3O4. The BC/g-C3N4/Co3O4 is applied as novel photocatalyst to degrade various pollutants and it exhibits remarkable photocatalytic activity and stability as compared to pure g-C3N4 and Co3O4. Furthermore, the BC/g-C3N4/Co3O4 can be effectively separated from solution in favor of practical applications.

      PubDate: 2018-05-29T09:46:40Z
       
  • Poisoning effect of CaO on Cu/ZSM-5 for the selective catalytic reduction
           of NO with NH3
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Hongyan Xue, Xiaoming Guo, Shengdong Wang, Chao Sun, Jun Yu, Dongsen Mao
      The influence of the presence of CaO in the Cu/ZSM-5 catalyst on the selective catalytic reduction of NO by NH3 was investigated. A series of samples containing different amounts of Ca loading have been prepared by the incipient wetness impregnation method. The catalysts were characterized using N2 adsorption/desorption, powder XRD, H2-TPR, NH3-TPD and XPS techniques. The Ca loading led to a decrease in the ability for reduction of CuO, a loss of the surface acid sites and a decrease in the surface concentration of Cu, which all appear responsible for the deactivation of Ca-impregnated Cu/ZSM-5 catalysts.

      PubDate: 2018-05-29T09:46:40Z
       
  • On the mechanism of high-temperature N2O decomposition over Fe-FER in the
           presence of NO
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Galina Sádovská, Milan Bernauer, Bohumil Bernauer, Edyta Tabor, Alena Vondrová, Zdeněk Sobalík
      The role of NO in the N2O decomposition under conditions relevant to its formation by NH3 oxidation during nitric acid production over iron-containing ferrierite (Fe-FER) catalyst was investigated. In particular, the relative productions of O2 and NO2 during the high-temperature decomposition of N2O over Fe-FER as the result of the direct recombination of adsorbed atomic oxygen (Oat) and of NO oxidation steps, respectively, were evaluated. These results proved the enhanced role of the direct Oat recombination step at higher temperatures but surprisingly also indicated persistent and substantial elimination of N2O due to NO oxidation during the formation of NO2 at T ≥ 800 °C.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • Strongly coupled polyoxometalates/oxygen doped g-C3N4 nanocomposites as
           Fenton-like catalysts for efficient photodegradation of sulfosalicylic
           acid
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Xiaoqiang An, Siqi Wu, Qingwen Tang, Huachun Lan, Yulin Tang, Huijuan Liu, Jiuhui Qu
      Fe-containing polyoxometalate clusters were coupled with carbon nitride to construct heterogeneous Fenton-like photocatalysts. Oxygen doping of carbon nitride was beneficial for the formation of strongly coupled interfaces, which not only contributed to the surface activation of oxygen molecules, but also facilitated the charge transfer from carbon nitride to polyoxometalate clusters. Due to the enhanced ability for generating peroxide radicals and the increased reactive sites for Fenton-like reactions, strongly coupled composites presented 6 times higher activity for the degradation of sulfosalicylic acid, compared to pristine carbon nitride. Our work offers an avenue to construct polyoxometalates/carbon nitride composite catalysts for synergistic contaminant removal.
      Graphical abstract image

      PubDate: 2018-05-29T09:46:40Z
       
  • h-BN@Copper(II) nanomaterial catalyzed cross-coupling reactions between
           sulfoximines and N-(phenylthio)-succinimide under mild condition
    • Abstract: Publication date: 5 July 2018
      Source:Catalysis Communications, Volume 112
      Author(s): Yan Lin, L.Ü. Guanghui, Yanzhao Liu, Yang Zheng, Ruifang Nie, Li Guo, Yong Wu
      A novel and efficient method for the synthesis of NS substituted sulfoximines has been established with h-BN-supported copper(II) nanomaterial as the catalyst. Catalyzed by this heterogeneous catalyst, the desired products were obtained with wide scope of substrates, good to excellent yields, free ligand and low-toxicity solvent. Moreover, after being reused ten times, there is almost no significant loss of its catalytic activity.

      PubDate: 2018-05-29T09:46:40Z
       
 
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
 
Home (Search)
Subjects A-Z
Publishers A-Z
Customise
APIs
Your IP address: 54.81.158.195
 
About JournalTOCs
API
Help
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-