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  Subjects -> ENGINEERING (Total: 2281 journals)
    - CHEMICAL ENGINEERING (192 journals)
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    - ELECTRICAL ENGINEERING (102 journals)
    - ENGINEERING (1203 journals)
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ENGINEERING (1203 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 7)
3D Research     Hybrid Journal   (Followers: 19)
AAPG Bulletin     Hybrid Journal   (Followers: 6)
AASRI Procedia     Open Access   (Followers: 15)
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: 233)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 2)
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: 6)
Advanced Science     Open Access   (Followers: 5)
Advanced Science Focus     Free   (Followers: 3)
Advanced Science Letters     Full-text available via subscription   (Followers: 7)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17)
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: 25)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 15)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 10)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 21)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Advances in Operations Research     Open Access   (Followers: 11)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances in Physics Theories and Applications     Open Access   (Followers: 12)
Advances in Polymer Science     Hybrid Journal   (Followers: 41)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Remote Sensing     Open Access   (Followers: 37)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 1)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 4)
AIChE Journal     Hybrid Journal   (Followers: 30)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access  
Alexandria Engineering Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 28)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 11)
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: 23)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
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)
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: 15)
Applied Clay Science     Hybrid Journal   (Followers: 5)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 12)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Network Science     Open Access  
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 3)
Applied Sciences     Open Access   (Followers: 2)
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: 4)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 7)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 3)
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: 8)
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: 4)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 23)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Motor Trade Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 2)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 2)
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)
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Biofuels Engineering     Open Access  
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 10)
Biomedical Engineering     Hybrid Journal   (Followers: 16)
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: 17)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 31)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 9)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 2)
Biotechnology Progress     Hybrid Journal   (Followers: 39)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription  
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 14)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 3)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 14)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 41)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 8)
Case Studies in Thermal Engineering     Open Access   (Followers: 3)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 6)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 8)
CEAS Space Journal     Hybrid Journal  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 3)
Central European Journal of Engineering     Hybrid Journal   (Followers: 1)
CFD Letters     Open Access   (Followers: 6)
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: 1)
CienciaUAT     Open Access  
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: 14)
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: 2)
Coal Science and Technology     Full-text available via subscription   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 5)
Coatings     Open Access   (Followers: 3)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 1)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 13)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 13)
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: 26)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Composite Structures     Hybrid Journal   (Followers: 257)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 181)
Composites Part B : Engineering     Hybrid Journal   (Followers: 237)
Composites Science and Technology     Hybrid Journal   (Followers: 216)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 14)
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: 6)
Computer Science and Engineering     Open Access   (Followers: 17)
Computers & Geosciences     Hybrid Journal   (Followers: 28)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 5)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 4)
Computers and Geotechnics     Hybrid Journal   (Followers: 10)
Computing and Visualization in Science     Hybrid Journal   (Followers: 5)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 30)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 6)
Control and Dynamic Systems     Full-text available via subscription   (Followers: 9)
Control Engineering Practice     Hybrid Journal   (Followers: 42)
Control Theory and Informatics     Open Access   (Followers: 8)
Corrosion Science     Hybrid Journal   (Followers: 25)
CT&F Ciencia, Tecnologia y Futuro     Open Access  
CTheory     Open Access  
Current Applied Physics     Full-text available via subscription   (Followers: 4)
Current Science     Open Access   (Followers: 58)

        1 2 3 4 5 6 7 | Last

Journal Cover Catalysis Communications
  [SJR: 1.029]   [H-I: 84]   [6 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1566-7367
   Published by Elsevier Homepage  [3044 journals]
  • Self-etching preparation of yolk-shell Ag@carbon nanostructures for highly
           effective reduction of 4-nitrophenol
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Donghai Wang, Bing Zhao, Yong Jiang, Pengfei Hu, Dongdong Gao, Haijiao Zhang
      Yolk-shell nanostructures have attracted much attention because of their superior properties in various fields. In the present work, a facile self-etching route has been used to synthesize uniform and highly active yolk-shell Ag@carbon nanostructures by selective etching of Ag nanoparticles as the core under an acidic environment. Both the penetrable carbon shell and the empty inner space provide a homogenous environment for heterogeneous catalysis and effectively prevent aggregation of Ag nanoparticles. The well-built Ag@carbon yolk-shell nanoparticles exhibit remarkable catalytic activity and an excellent cycling stability for the reduction of 4-nitrophenol due to their uniform shape, penetrable carbon shell and stable nanostructure.
      Graphical abstract image

      PubDate: 2017-09-20T08:08:13Z
       
  • Fabrication of silica nanoparticle-supported copper quantum dots and the
           efficient catalytic Ullmann coupling reaction
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Aiqin Gao, Hongjuan Zhang, Liu Hu, Aiqin Hou, Kongliang Xie
      Copper quantum dots (Cu-QDs@silica), with a bird's nest-like structure, were synthesized using silica nanoparticles (NPs) as the support materials for use in the Ullmann coupling reaction of bromamine acid. The average size of the QDs is 2.5nm, with a very narrow diameter range between 1.5 and 4.5nm. The Cu-QDs are imbeded inside the framework of the silica bird's nest-like structure with excellent dispersion stability. The Cu-QDs@silica catalyst showed high catalytic activity for the bromamine acid Ullmann reaction. Using water as the medium, the conversion of bromamine acid reached 96.37% when heated to 90°C after 2h.
      Graphical abstract image

      PubDate: 2017-09-20T08:08:13Z
       
  • Production of liquid fuel from palmitic acid over nanocrystalline
           CeO2-based catalysts with minimal use of H2
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Tosapol Maluangnont, Chalinee Dararat, Teerapong Kulrat, Surachet Soontontaweesub, Thitima Anothaiwalaikul, Piyawadee Bunprechawong, Rawipot Chanda, Jarin Kanchanawarin, Pinit Kidkhunthod, Tawan Sooknoi
      The deoxygenation of palmitic acid into diesel-range hydrocarbons can be promoted over nanocrystalline ceria-based catalysts under atmospheric N2 or 10% H2/N2 in a fixed-bed flow reactor at 400°C. Oxygen vacancy sites are active for ketonization of palmitic acid to C31 ketone and also subsequent cracking of the formed ketone to hydrocarbons. The 22–31% selectivity of C9 to C17 liquid hydrocarbons can be achieved at 100% palmitic acid conversion. The deoxygenation under N2 can be facilitated, presumably by hydrogen transfer from coke precursors. Catalytic activity of ceria-based catalysts can be tuned by pretreatment conditions, type of a carrier gas, or lattice modification.
      Graphical abstract image

      PubDate: 2017-09-20T08:08:13Z
       
  • Gas phase hydrodeoxygenation of anisole and guaiacol to aromatics with a
           high selectivity over Ni-Mo/SiO2
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Tao He, Xinxin Liu, Yuanzheng Ge, Dezhi Han, Jianqing Li, Zhiqi Wang, Jinhu Wu
      A very active Ni-Mo bimetallic catalyst supported on SiO2 was prepared for the hydrodeoxygenation (HDO) reaction of anisole and guaiacol under a H2 partial pressure of 83kPa. Generally, transition metal and their oxides were thought to have less HDO activity than others, such as sulfides, carbides, phosphides. However, this work achieved a novel deoxygenation result, where a high conversion (98.7%) at 673–693°C and atmospheric pressure for the model compounds and high selectivity (>96%) to aromatic hydrocarbons (BTX) were obtained. Furthermore, the methyl transfer reaction is greatly promoted by abundant acid sites of the catalyst, leading to a low carbon-loss. The present work provides a promising way and new insight for an economic and efficient HDO process for the lignin-derived thermal degradation products.

      PubDate: 2017-09-20T08:08:13Z
       
  • P-, B- and N-doped carbon black for the catalytic wet peroxide oxidation
           of phenol: Activity, stability and kinetic studies
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): J.L. Diaz de Tuesta, A. Quintanilla, J.A. Casas, J.J. Rodriguez
      Doped carbon blacks with P, B and N were prepared and tested as catalysts for the wet peroxide oxidation of phenol. N precursors allowed incorporating a higher amount of the doping element on the outermost surface. Phosphoric and boric acids as well as urea and pyridine yielded doped carbons with significantly high activity for the oxidation and mineralization of phenol and its aromatic intermediates. The kinetic model applied, scarcely reported on doped-carbons, showed reaction rate constants values up to eight times larger than those of the original carbon. This behavior was attributed to the more acidic character of doped-carbons.
      Graphical abstract image

      PubDate: 2017-09-20T08:08:13Z
       
  • Gold nanoparticles on cyanuric acid-based support: A highly active
           catalyst for the reduction of 4-nitrophenol in water
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Hongfan Guo, Yangyang Ren, Qiuxiang Cheng, Dan Wang, Yunyi Liu
      Graphical abstract image

      PubDate: 2017-09-20T08:08:13Z
       
  • A hemicellulose modified HZSM-5 and their application in the light olefins
           oligomerization to high-quality liquid fuels reaction
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Chao Li, Jian Du, Hui Wang, Xuemin Li, ShanShan Zhu, Guangbo Liu, Jinhu Wu
      The biomass hemicellulose as well as initiating agents (ammonium persulfate and tetramethylethylenediamine) was first used as additive for traditional hydro-thermal synthesis for ZSM-5. The results demonstrate that the addition of biomass hemicellulose and initiating agents make the HZSM-5-Hc-S catalyst have larger BET surface areas, more mesopore structure, and stronger acidity. As a result, the HZSM-5-Hc-S catalyst exhibits high stability for the butene oligomerization with butene conversion of about 90% and diesel selectivity of about 86% during the 72h time on stream.
      Graphical abstract image

      PubDate: 2017-09-13T13:10:14Z
       
  • Skeletal isomerization of n-heptane with highly selective
           Pt/H3PW12O40/SBA–15 trifunctional catalysts
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): N. de la Fuente, J.A. Wang, L.F. Chen, J. González, J. Salmones, J.L. Contreras, J. Navarrete
      For the first time, highly selective Pt/H3PW12O40/SBA–15 trifunctional catalysts were evaluated for n-heptane hydroisomerization. Both Lewis (L) and Brønsted (B) acid sites were present in these catalysts. Reduction treatment led to heteropolyacid dispersion better and Pt nanoparticles smaller. With the best 1wt%Pt/20wt%H3PW12O40/SBA–15 catalyst, 100% isomerization selectivity and 56.74% n-heptane conversion were obtained at 320°C. Among the products, the dibranched isomers concentration faction was >50% and 2,2-dimethylpentane was predominant. Pt/H3PW12O40/SBA–15 catalysts with Pt nanocrystals, proper acidity strength and a balanced ratio of B/L acid sites, and highly ordered large mesopores were chiefly responsible for the high isomerization selectivity.
      Graphical abstract image

      PubDate: 2017-09-13T13:10:14Z
       
  • Improved stability of Ni/SiO2 catalysts in CO2 and steam reforming of
           methane by preparation via a polymer-assisted route
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Uwe Rodemerck, Matthias Schneider, David Linke
      Ni supported on two different silicas was prepared applying a polymer-assisted route and their activity and stability in CO2 and steam reforming of methane was compared with catalysts prepared by conventional impregnation with Ni nitrate. The new catalysts are more active and stable in both reactions. The stability against deactivation is ascribed to increased metal-support interaction by forming smaller initial NiO particles. Additionally, less coke of deactivating type is formed over these catalysts.
      Graphical abstract image

      PubDate: 2017-09-13T13:10:14Z
       
  • Compensation between activation entropy and enthalpy in reactions of
           aromatic hydrocarbons catalyzed by solid acids
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Koshiro Nakamura, Ryo Mizuta, Satoshi Suganuma, Etsushi Tsuji, Naonobu Katada
      Reaction rates of toluene disproportionation (A) and cumene cracking (B) normalized by the number of Brønsted acid sites were analyzed on aluminosilicates. The activation entropy showed linear and compensatory relationship against the activation enthalpy. The slope of entropy-enthalpy plot was in the order of (B)>(A)>small alkane cracking, whereas the intercept on the horizontal axis was in the order of propane and isobutane cracking>linear C4–8 alkanes and iso-pentane cracking>(A)>(B). The former is consistent with the bulkiness of reactant, while the latter is consistent with intrinsic difficulty of formation of intermediate cations.
      Graphical abstract image

      PubDate: 2017-09-13T13:10:14Z
       
  • Synthesis of secondary amines by reductive amination of aldehydes with
           nitroarenes over supported copper catalysts in a flow reactor
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Alexey L. Nuzhdin, Ekaterina A. Artiukha, Galina A. Bukhtiyarova, Elizaveta A. Derevyannikova, Valerii I. Bukhtiyarov
      Supported copper catalysts were investigated for the one-pot reductive amination of aldehydes with nitroarenes in a continuous flow reactor. This process is considered advantageous compared to current traditional methods, which present several drawbacks, such as toxicity of reducing or alkylation agent, lack of monoalkylation selectivity and large amounts of waste produced. Various secondary amines were synthesized in good to excellent yields in the reactions of aliphatic aldehydes with nitroarenes using molecular hydrogen as a reducing agent. It was found that the yield of secondary amine depends on the rate of formation of intermediate imine.
      Graphical abstract image

      PubDate: 2017-09-13T13:10:14Z
       
  • Asymmetric hydrolysis of styrene oxide by PvEH2, a novel Phaseolus
           vulgaris epoxide hydrolase with extremely high enantioselectivity and
           regioselectivity
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Chuang Li, Die Hu, Xun-Cheng Zong, Chao Deng, Lei Feng, Min-Chen Wu, Jian-Fang Li
      A novel EH from Phaseolus vulgaris, PvEH2, was discovered based on the computer-aided analysis, and its encoding gene was cloned and expressed in E. coli Rossetta (DE3). The substrate spectrum of recombinant (re) PvEH2 was assayed, among which the enantiomeric ratio of rePvEH2 towards racemic styrene oxide (rac-1a) was >200, while its regioselectivity coefficients, α S and β R , towards (S)- and (R)-1a were 99.1 and 69.8%, respectively. The asymmetric hydrolysis of 20mM rac-1a by rePvEH2-expressing whole cells was performed at 25°C, retaining (R)-1a with >99.5% ee s and 49.4% yield and producing (R)-phenyl-1,2-ethanediol (1b) with 96.2% ee p and 49.7% yield in 40min.
      Graphical abstract image

      PubDate: 2017-09-07T11:22:05Z
       
  • Nano CoCuFe2O4 catalyzed coupling reaction of acid chlorides with terminal
           alkynes: A powerful toolbox for palladium-free ynone synthesis
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Firouz Matloubi Moghaddam, Raheleh Pourkaveh, Marzieh Ahangarpour
      The present work describes the application of nano CoCuFe2O4 toward the coupling reaction of acyl chlorides with terminal alkynes. By this catalytic system, ynone derivatives were formed in high yields via a palladium-free strategy. This protocol avoids the use of phosphine ligands as well as toxic CO sources. Recovery of catalyst by employing an external magnetic field and its reuse up to 9 consecutive trials confirm the robustness of this catalytic system.
      Graphical abstract image

      PubDate: 2017-09-07T11:22:05Z
       
  • CH4 internal dry reforming over a Ni/YSZ/ScSZ anode catalyst in a SOFC: A
           transient kinetic study
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Wenbin Yin, Steven S.C. Chuang
      We used a transient kinetic technique, which involves a step-switching of the reactant flows, to identify the reaction pathways on the Ni anode catalysts of SOFCs utilizing CH4/CO2 and CH4 as fuels. Carbon deposited at the external layer of the Ni anode support in CH4-SOFC. The transient response revealed that carbon deposition, which occurred with CH4 as a fuel molecule, was suppressed and dominated by the dry reforming of CH4/CO2 to CO/H2 and the electrochemical oxidization of CO/H2. Electricity generation from the electrochemical oxidation reactions is governed by Faraday resistance at the anode Ni catalyst interlayer.
      Graphical abstract image

      PubDate: 2017-09-07T11:22:05Z
       
  • Asymmetric sequential double Michael reactions of γ,δ-unsaturated
           β-ketoesters to nitroolefins catalyzed by Ni (II)-diamine complex
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Shengying Huang, Karen Scherer, Bukuo Ni
      The asymmetric sequential double Michael reactions of γ,δ-unsaturated β-ketoesters and nitroolefins catalyzed by 2mol% of readily prepared Ni(II)-bis[(R,R)-N,N′-dibenzylcyclohexane-1,2-diamine] complex and then with 1 equivalent of tetramethylguanidine (TMG) for cyclization have been developed. The reaction gave the corresponding Michael adducts of multifunctional cyclohexenol derivatives with three chiral stereocenters in good yields, moderate diastereoselectivities, and high enantioselectivities under mild reaction conditions.
      Graphical abstract image

      PubDate: 2017-09-07T11:22:05Z
       
  • A novel and highly efficient approach for the production of biodiesel from
           high-acid content waste cooking oil
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Daoming Li, Weifei Wang, Muniba Faiza, Bo Yang, Yonghua Wang
      A novel and highly efficient process for the production of biodiesel from high-acid content waste cooking oil (WCO) was developed. Free fatty acids (FFAs) and partial glycerides in WCO were first converted to FA methyl esters (FAME) by immobilized partial glycerides selective lipase SMG1-F278N-catalyzed esterification/transesterification, while leaving triacylglycerol (TAG) intact. FFAs decreased from 28.69% to 0.05% after 8h of reaction under the applied optimal conditions and the immobilized SMG1-F278N showed excellent reusability up to 20 consecutive batches. Subsequently, the remaining TAG was transesterified to FAME by sodium hydroxide-catalyzed transesterification and 98.24% FAME was obtained after 20min of reaction.
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      PubDate: 2017-09-07T11:22:05Z
       
  • The function of Pt in plasma-assisted NOx storage and reduction
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Zhifeng Bai, Bingbing Chen, Limei Yu, Qi Zhao, Mark Crocker, Chuan Shi
      The storage and reduction of NOx was examined over a series of mechanically mixed LaMn0.9Fe0.1O3 (LMF)+Ba/Al2O3 (BA), Pt-LMF+BA and LMF+BA+Pt/Al2O3 (PA) catalysts in order to investigate the function of Pt in plasma-assisted NSR reaction. Efforts were also made to optimize the location of Pt to give the best H2 reduction ability.
      Graphical abstract image

      PubDate: 2017-09-07T11:22:05Z
       
  • Insights into heterogeneous catalytic activation of peroxymonosulfate by
           Pd/g-C3N4: The role of superoxide radical and singlet oxygen
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Yanbin Wang, Di Cao, Man Liu, Xu Zhao
      Pd nanoparticles anchored on graphitic nitride carbon (Pd/g-C3N4) hybrid catalytic system was prepared by a simple KBH4 reduction method. Pd/g-C3N4 was very active in the degradation of bisphenol A (BPA) by efficiently activating peroxymonosulfate (PMS). Important influencing factors, such as catalyst dosage, PMS concentration, pH and reaction temperature for the BPA removal were investigated. Pd/g-C3N4-PMS demonstrated a wide effective pH range, namely 3.0–9.0. Radical quenching tests and electron spin response (ESR) analyses revealed that superoxide radical (O2 −) and singlet oxygen (1O2) instead of sulfate radical (SO4 −) and hydroxyl radicals (OH) were the major oxidized species for the degradation of BPA.
      Graphical abstract image

      PubDate: 2017-09-07T11:22:05Z
       
  • Synthesis of Ti3+ and P5+ co-doped TiO2 nanocrystal with enhanced visible
           light photocatalytic activity
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Yao Xiao, Xin Yu, Yi Gao, Jiawen Liu, Zhonghua Li
      The surface Ti3+ and P5+ co-doped {001} and {101} faceted TiO2 nanocrystal was successfully prepared by a shape-control regent-free method. The as-synthesized TiO2 nanocrystal showed amazing visible-light absorption and ultra-high visible-light-driven photocatalytic hydrogen evolution activity (724μmolg−1 h−1), which was 24 times than that of P25 TiO2 catalyst, and the visible light photocatalytic mechanism for hydrogen production was proposed.
      Graphical abstract image

      PubDate: 2017-09-02T11:12:24Z
       
  • Facile fabrication of novel Mn2O3 nanocubes with superior light-harvesting
           for ciprofloxacin degradation
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Jianhui Zhao, Jun Nan, Zhiwei Zhao, Ning Li
      The novel Mn2O3 nanocubes were first fabricated by one-pot hydrothermal method. The microstructure and crystal type of the as-prepared Mn2O3 were characterized by XRD, XPS, SEM and TEM analyses. Results showed that the Mn2O3 nanocubes were cubic bixbyite with side length ranging from 65 to 103nm. Interestingly, the Mn2O3 nanocubes exhibited strong absorption to ultraviolet light as well as visible light, achieving 94.7% and 85.4% removal of ciprofloxacin and total organic carbon (TOC) respectively under simulated sunlight irradiation for 90min. The Mn2O3 nanocubes would be a good candidate for persistent contaminants degradation by photocatalysis.
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      PubDate: 2017-09-02T11:12:24Z
       
  • A novel strategy to improve the aromatic alcohols tolerance of enzyme for
           preparative-scale synthesis of natural glycosides
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Youzhi Zhou, Lu Zhao, Ke Liu, Jinsong Zhang, Jianlin Chu, Bingfang He
      Aromatic alcohols are liable to result in enzyme inactivation. A novel strategy was established for improving the aromatic alcohol tolerance of β-galactosidase (BMG) from Bacillus megaterium YZ08. The half-life of BMG in 200mM vanillyl alcohol solution was dramatically increased by 9–123 times with the addition of hydrophilic solvents. In 30% DMSO, the reaction concentration of aromatic alcohol could reach up to 300–400mM, and 0.85–2.44g of natural glycosides were successfully obtained in 100mL-scale. The simple and effective strategy shows potential applications when dealing with the preparative-scale exploitation of enzymatic reactions.
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      PubDate: 2017-09-02T11:12:24Z
       
  • Photothermal effect of infrared light to enhance solar catalytic hydrogen
           generation
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Xinxin Liu, Liqun Ye, Zhaoyu Ma, Chunqiu Han, Li Wang, Zhuoya Jia, Fengyun Su, Haiquan Xie
      Higher reaction temperature can induce the better solar catalytic hydrogen (H2) production performance on noble-metal loaded photocatalyst. Here, the thermal effect generated by the infrared light was used to enhance the solar catalytic hydrogen production from methanol-water solution. The light to hydrogen (LTH) conversion efficiency of Pt/TiO2 reached to 0.36% under full spectrum light source. The results indicated that infrared part of solar light can be utilized as thermal source to enhance the photocatalytic hydrogen generation.
      Graphical abstract image

      PubDate: 2017-09-02T11:12:24Z
       
  • Sandwich-like MIL-100(Fe)@Pt@MIL-100(Fe) nanoparticles for catalytic
           hydrogenation of 4-nitrophenol
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Zhiming Chen, Bo Xu, Xiaomei Wang, Li Zhang, Xiaoqing Yang, Cuncheng Li
      Separation and recycling of noble metal nanoparticles after catalytic reaction is critical to promote its application efficiency and cut down the cost. This work presents a facile synthesis strategy for the fabrication of sandwich-like MIL-100(Fe)@Pt@MIL-100(Fe) (denoted as S-Pt) nanoparticles with high stability and improved catalytic activity for hydrogenation of nitrophenol. MIL-100(Fe) acts as both carrier to make the catalyst easily separated and shield to protect the tiny Pt nanoparticles from leaching or aggregation during reaction. Moreover, mass transfer effect of the porous MIL-100(Fe) with its pore structure serving as nano-reactor is also benefit for promoting the catalytic efficiency.
      Graphical abstract image

      PubDate: 2017-09-02T11:12:24Z
       
  • Fast and regenerative photocatalyst material for the disinfection of E.
           coli from water: Silver nano particle anchor on MOF-5
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Sanjay R. Thakare, Shruti M. Ramteke
      Ag@MOF-5 was fabricated successfully and used as a photocatalyst for the disinfection of water containing E. coli bacteria as a representative biological material. The compound was characterized by using various techniques like SEM, TEM, FTIR, XRD, UV–Visible spectrophotometry and Raman analysis. Ag@MOF-5 showed a rapid inactivation of >91% bacteria in only 70min of time under visible light irradiation. Silver nanoparticles play dual role as light absorbers as well as to assist electron capture center and catalyse the reactive oxygen species production reactions. The results shows that Ag@MOF-5 has very good photo-catalytic disinfection activity on E. coli infected water.
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      PubDate: 2017-09-02T11:12:24Z
       
  • 2-Chloro/phenyl-7-arylimino-6,6-dimethylcyclopenta[b]pyridylnickel
           chlorides: Synthesis, characterization and ethylene oligomerization
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Hongyi Suo, Youfu Zhang, Zhifeng Ma, Wenhong Yang, Zygmunt Flisak, Xiang Hao, Xinquan Hu, Wen-Hua Sun
      2-Chloro/phenyl-7-arylimino-6,6-dimethylcyclopenta[b]pyridylnickel chlorides (Ni1–Ni8) were synthesized from the respective ligands L1–L8 and characterized. Upon activation with either methylaluminoxane (MAO) or ethylaluminium sesquichloride (EASC), they show high catalytic activity of up to 10.84×106 g(oligomer) mol−1(Ni) h−1 in ethylene oligomerization. The products range from butenes to dodecenes for Ni1–Ni4, but are limited to butenes and hexenes in the case of Ni5–Ni8. DFT calculations indicate that the NiC bond length in the model alkyl complexes depends both on the nature of the substituents at the heterocycles and the kind of the alkyl group, shedding some light on the preferences of the precatalysts toward oligomers or polyethylene.
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      PubDate: 2017-09-02T11:12:24Z
       
  • Plasma-enhanced copper dispersion and activity performance of Cu-Ni/ZrO2
           catalyst for dimethyl oxalate hydrogenation
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): ChuanCai Zhang, Denghao Wang, Mingyuan Zhu, Feng Yu, Bin Dai
      An efficient plasma-treated method of Cu-Ni/ZrO2 catalyst was prepared via the deposition–precipitation method for the selective hydrogenation of dimethyl oxalate (DMO) to ethylene glycol (EG). Compared with the untreated sample, the plasma- treated Cu-Ni/ZrO2 catalyst exhibited enhanced Cu dispersion and significantly improved selectivity to EG and stability for long time on stream. An ethylene glycol selectivity of higher than 95% was obtained after 150h of reaction. XRD and TEM measurements revealed that the mean copper particle size of the catalyst was remarkably reduced by plasma pretreatment. TPR and XPS measurements also indicated that copper dispersion was improved.
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      PubDate: 2017-09-02T11:12:24Z
       
  • Asymmetric bioreduction of keto groups of 4- and 5-Oxodecanoic
           acids/esters with a new carbonyl reductase
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Chao Zhang, Jiang Pan, Chun-Xiu Li, Yun-Peng Bai, Jian-He Xu
      A novel carbonyl reductase from Serratia marcescens, SmCR, was successfully cloned and overexpressed in Escherichia coli. SmCR could catalyze the asymmetric reduction of long-chain keto acids/esters containing remote carbonyl groups, such as 4-oxo- and 5-oxodecanoic acids, yielding chiral γ- and δ-decalactones with high enantiopurity (up to 99% ee). This is the first report of enzymatic synthesis of (R)-γ- and (R)-δ-decalactones starting from γ-, δ-keto acids using free enzymes.
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      PubDate: 2017-09-02T11:12:24Z
       
  • In situ generated Ni(0)@boehmite from NiAl-LDH: An efficient catalyst for
           selective hydrogenation of biomass derived levulinic acid to
           γ-valerolactone
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Sreedhar Gundekari, Kannan Srinivasan
      We report in situ generation of Ni(0)@boehmite from NiAl-layered double hydroxide (LDH) under reaction conditions which showed superior catalytic activity in the hydrogenation of levulinic acid (LA) to γ-valerolactone (Gvl) with quantitative yield in aqueous medium. Formation of Ni(0)@boehmite in course of the reaction was confirmed by PXRD, TEM, TGA and FT-IR. This catalyst shows superior conversion compared to a series of simple Ni based homogeneous as well as heterogeneous catalysts. The Ni(0)@boehmite catalyst is recyclable, and active even at higher concentrations of LA (25wt%).
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      PubDate: 2017-09-02T11:12:24Z
       
  • A copper(I)-complexed magnetic nanoparticle catalyst for enaminone
           synthesis
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Leila Mohammadi, Mohammad Ali Zolfigol, Mahsa Ebrahiminia, Kenneth P. Roberts, Samira Ansari, Tahereh Azadbakht, Syed R. Hussaini
      The synthesis of a copper(I)-complexed magnetic nanoparticle catalyst is described. The catalyst was characterized using Fourier transform infrared spectroscopy (FT–IR), energy-dispersive X-ray spectroscopy (XPS), atomic absrobtion spectroscopy (AA), thermogravimetric analysis (TGA), vibrating sample magnetometery (VSM), X-ray photoelectron spectroscopy (XPS), scanning electron miscroscopy (SEM) and transmission electron microscopy (TEM). The catalyst coupled thioamides and diazocarbonyl compounds to produce diverse enaminones. The catalyst reduced the reaction times and temperature and provided enaminones in high yields and selectivity. Moreover, the catalyst can be separated by a magnet and recycled.
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      PubDate: 2017-09-02T11:12:24Z
       
  • Highly active Ru-g-C3N4 photocatalyst for visible light assisted selective
           hydrogen transfer reaction using hydrazine at room temperature
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Priti Sharma, Yoel Sasson
      The present study describes the highly efficient heterogeneous photoactive catalyst Ru-g-C3N4 screened for selective transfer hydrogenation of nitroarenes and olefins. Photoactive catalyst Ru-g-C3N4 exhibits excellent reactivity in visible light under very mild reaction conditions via using hydrazine hydrate as a source of hydrogen with high turnover number. The easily separable heterogeneous photoactive Ru-g-C3N4 catalyst is straightforward to handle in visible light (LED lamp), non-toxic, environmentally friendly and at the same time eliminates the use of high pressure hydrogenation reactors without the need for external sources of energy.
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      PubDate: 2017-09-02T11:12:24Z
       
  • Selective Pd-catalyzed hydrogenation of 3,3-diphenylallyl alcohol:
           Efficient synthesis of 3,3-diarylpropylamine drugs diisopromine and
           feniprane
    • Abstract: Publication date: December 2017
      Source:Catalysis Communications, Volume 102
      Author(s): Thiago S. Claudino, Jackson D. Scholten, Adriano L. Monteiro
      The Pd-catalyzed selective hydrogenation of CC double bond in (3,3-diphenylallyl)diisopropylamine or 3,3-diphenylallyl alcohol was evaluated using different catalytic systems [Pd/C, Pd(OAc)2/ionic liquid, isolated Pd(0) nanoparticles]. For the (3,3-diphenylallyl)diisopropylamine, hydrogenolysis is preferred over hydrogenation, and only moderate selectivities were obtained for the desired product. However, complete conversion and 100% selectivity were obtained for the hydrogenation of 3,3-diphenylallyl alcohol using isolated Pd(0) nanoparticles under mild condition. This successful strategy enabled the effective synthesis of diisopromine and feniprane drugs and opens new possibilities for the preparation of other biologically active compounds.

      PubDate: 2017-09-02T11:12:24Z
       
  • Editorial Board/Aims & Scope
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101


      PubDate: 2017-09-02T11:12:24Z
       
  • Sponge-structured titanosilicate zeolite with high catalytic activity in
           epoxidation of fatty acid methyl ester
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Yao Zhang, Changjiu Xia, Min Lin, Qinghua Duan, Bin Zhu, Xinxin Peng, Baorong Wang, Shuai Yuan, Yinong Liu, Xingtian Shu
      Epoxidation of fatty acid methyl ester (FAME) is commercially adopting peracids process, which possesses low selectivity and serious pollution problems. Herein, spongy titanosilicate zeolite with high catalytic performance in epoxidation of fatty acid methyl ester (FAME) has been demonstrated. The zeolite is constructed by combining pore-extending and post-treatment processes, which features mesopores with a diameter of 3–5.5nm. Thus, in the epoxidation of FAME with tert-butyl hydroperoxide under 90°C, the spongy TS-1 zeolite exhibits >99% conversion within 3h, far higher than that of TS-1 (39%), with a high selectivity (>90%) of epoxy product as well.
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      PubDate: 2017-09-02T11:12:24Z
       
  • Recyclable copper-catalyzed ambient aerobic oxidation of primary alcohols
           to aldehydes in water using water-soluble PEG-functionalized pyridine
           triazole as ligand
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Nan Sun, Xiaonan Zhang, Liqun Jin, Baoxiang Hu, Zhenlu Shen, Xinquan Hu
      A water-soluble PEG-PyTa ligand, conveniently derived from commercially available reagents via a simple synthetic approach, could efficiently promote copper/2, 2, 6, 6-tetramethyl piperidine-1-oxyl (TEMPO)-catalyzed aerobic oxidation of primary alcohols to aldehydes in water under room temperature. A number of primary benzylic, allylic alcohols and heteroaryl methanols were selectively converted into their corresponding aldehydes with excellent yields. The oxidation products could be isolated by simple extraction, and the residual aqueous phase containing the catalyst Cu(OTf)2/PEG-PyTa could be reused at least 7 times.

      PubDate: 2017-09-02T11:12:24Z
       
  • Carbonylative Suzuki cross-coupling reaction catalyzed by bimetallic Pd-Pt
           nanodendrites under ambient CO pressure
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Zheng-Jun Wang, Xue-Yan Wang, Xia Wang, Zhi-Wu Liang, Xinhua Xu
      Pd-catalyzed reactions between aryl boronic acids and aryl halides have undergone rapid development since the pioneering work of Suzuki and co-workers in 1979. In this paper, we described a high-efficient and cost-effective bimetallic Pd-Pt nanodendrites catalyst based on a ligand-free strategy to synthesize diaryl ketones via CO direct insertion to boronic acids and aryl halides. A variety of aryl boronic acids and aryl halides were investigated, which showed great functional group tolerance and versatile aryl ketone products in high yield.
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      PubDate: 2017-09-02T11:12:24Z
       
  • An inexpensive and environmentally friendly activated marble waste as a
           catalyst for vapour phase dehydration of 1,4-butanediol to tetrahydrofuran
           
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Jyothi Yadagiri, Veera Somaiah Puppala, Hari Prasad Reddy Kannapu, Venkateshwarlu Vakati, Kumara Swamy Koppadi, David Raju Burri, Seetha Rama Rao Kamaraju
      Dehydration ability of activated marble waste consisting of CaO (62.12%), MgO (26.8%), SiO2 (9.24%) including minor amount of Fe (1.94%), Na (0.70%), P (0.019%), K (0.11%) and Mn (0.13%) was examined in the formation of tetrahydrofuran from biomass derived 1,4-butanediol. An excellent catalytic activity was observed as BDO conversion was 95% with >95% yield of tetrahydrofuran at 375°C. The best reaction conditions were found by studying various reaction parameters such as effect of temperature, flow rate and time on stream study. Activated marble waste was characterized by using XRD, XRF, N2 physisorption, TG/DTA analysis, CO2-TPD, SEM and TEM. The high catalytic activity of AWM was attributed to the presence of high basic nature of the marble waste.
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      PubDate: 2017-09-02T11:12:24Z
       
  • Unsupported transition metal-catalyzed hydrodeoxygenation of guaiacol
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Chi-Cong Tran, Filip Stankovikj, Manuel Garcia-Perez, Serge Kaliaguine
      Unsupported transition metal sulfides with relatively high surface areas were synthesized by using mesoporous silicas as hard templates. The prepared catalysts were characterized by N2 physisorption, TEM, and NH3-TPD method. The products from HDO of guaiacol over the catalysts were analyzed by GC–MS. The analysis results indicated that the acidity of catalysts facilitated the dehydration and transalkylation reactions to yield hydrocarbons and methylated products. Unsupported NiMoW catalyst performed the highest deoxygenation activity among catalysts studied, which were likely attributed to a large number of active sites exposed and the effect of W supplement.
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      PubDate: 2017-09-02T11:12:24Z
       
  • Coupling reaction in catalytic decomposition of cyclohexyl hydroperoxide
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Xi Zheng, Jiping Ma, Min Wang, Song Shi, Zhiqiang Sun, Jie Xu
      Coupling reaction of cyclohexyl hydroperoxide (CHHP) decomposition and cyclohexane oxidation in the process of catalytic decomposition of CHHP was identified via cyclopentane instead of cyclohexane used as solvent. A method was established to evaluate this coupling reaction. Based on this method, it can be accurately distinguished the product of cyclohexanol and cyclohexanone (K/A oil) derived from whether decomposition of CHHP or oxidation of cyclohexane. The established method is of great significance to the further study of the coupling reaction.
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      PubDate: 2017-09-02T11:12:24Z
       
  • Microbiological bio-reduction of prochiral carbonyl compounds by
           antimycotic agent Boni Protect
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Renata Kołodziejska, Renata Studzińska, Marcin Kwit, Maciej Jelecki, Agnieszka Tafelska-Kaczmarek
      The selective properties of the fungus Aureobasidium pullulans, in the antifungal agent Boni Protect, were investigated in the fermentative bioreduction of selected carbonyl compounds. Catalyzed by oxidoreductases contained in the microorganism Aureobasidium pullulans highly enantioselective biotransformation of prochiral ketones provides the secondary alcohols when the reaction is done in the presence of specific additives. Aureobasidium pullulans has also proved to be an effective bioreagent in the reduction of α- and β-keto esters. Optically pure hydroxy esters were obtained under fermentation conditions without the use of additives.
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      PubDate: 2017-09-02T11:12:24Z
       
  • Effect of ceria morphology on the catalytic activity of Co/CeO2 catalyst
           for ammonia synthesis
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Bingyu Lin, Yi Liu, Lan Heng, Jun Ni, Jianxin Lin, Lilong Jiang
      A series of Co/CeO2 catalysts with different morphology of CeO2 support were prepared. It was shown that part of Co species could be introduced into the CeO2 lattice and thus a new CoO bonding would be created for the ceria-supported Co catalysts. The morphology of CeO2 was found to affect the reduction of both the cobalt oxides and CeO2. A larger amount of CeO2 was reduced in the case of Co supported on polyhedral CeO2. Catalytic tests showed that the higher concentration of Ce3+ and the lower binding energy of Co species present in the catalyst are key factors that led to higher ammonia synthesis rates for the Co/CeO2 catalysts.
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      PubDate: 2017-08-02T22:55:39Z
       
  • Direct oxidative CH amination of quinoxalinones under copper-organic
           framework catalysis
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Thanh T. Hoang, Tuong A. To, Vi T.T. Cao, Anh T. Nguyen, Tung T. Nguyen, Nam T.S. Phan
      A copper-organic framework Cu-CPO-27 was synthesized, and utilized as a recyclable heterogeneous catalyst for the direct CH amination of quinoxalin-2(1H)-ones with amines to produce 3-aminoquinoxalin-2(1H)-ones. High yields were achieved in the presence of molecular oxygen as the oxidant. This framework was more catalytically active than a number of MOF-based catalysts. The Cu-CPO-27 also displayed higher performance than CuFe2O4 nanoparticles. The copper-organic framework catalyst could be reutilized in the synthesis of 3-aminoquinoxalin-2(1H)-ones via the direct CH amination reaction without a remarkable deterioration in catalytic performance. To our best knowledge, this is the first heterogeneous catalytic protocol to generate 3-aminoquinoxalin-2(1H)-ones.
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      PubDate: 2017-08-02T22:55:39Z
       
  • Hierarchical TS-1 synthesized via the dissolution-recrystallization
           process: Influence of ammonium salts
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Baorong Wang, Xinxin Peng, Wenfeng Zhang, Min Lin, Bin Zhu, Weilin Liao, Xiaohong Guo, Xingtian Shu
      TS-1 was post-modified by ammonium salts or tetrapropylammonium hydroxide (TPAOH). During the ammonium salts modification, the crystals were eroded and extra-framework titanium species were formed. After the combined-modification, hierarchical TS-1 with secondary pore volume in the 0.22–0.28cm3/g range was obtained via the intensified dissolution-recrystallization process, although more extra-framework titanium species were generated as five-/six-coordinated species. In cyclohexene oxidation with tert-butyl hydroperoxide (TBHP) as the oxidant, the activity of modified TS-1 decreased when anatase was formed only. However, it increased in the presence of five-/six-coordinated titanium. The secondary porosity further improved the catalytic performance and the activity of the combined-modified TS-1 samples increased remarkably by >100%.

      PubDate: 2017-08-02T22:55:39Z
       
  • Highly selective reduction of nitroarenes to anilines catalyzed using
           MOF-derived hollow Co3S4 in water under ambient conditions
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Yong Xu, Xiao-Jun Lv, Yong Chen, Wen-Fu Fu
      We developed a new strategy for the efficient reduction of nitroarenes using sodium sulfide as reducing agent with MOF-derived Co3S4 as catalyst in water and at room temperature. The introduction of sodium sulfite enhanced the reactant conversion and product selectivity, and the as-synthesized catalyst was used repeatedly five times and retained its activity and selectivity. A wide spectrum of reducible functional moieties kept unaffected under the reaction conditions, and isotope labeling experiment showed the hydrogen atom was derived from water.
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      PubDate: 2017-08-02T22:55:39Z
       
  • Reduced graphene oxide supported Cu2O nanoparticles as an efficient
           catalyst for Sonogashira coupling reaction
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Bing Wang, Yingyong Wang, Xiaoning Guo, Zhifeng Jiao, Guoqiang Jin, Xiangyun Guo
      Reduced graphene oxide supported Cu2O nanoparticles were prepared by a liquid-phase reduction method and employed as an efficient heterogeneous catalyst for Sonogashira cross-coupling reaction. The catalyst exhibits high activity and selectivity towards the reaction of aryl halides with phenylacetylene under palladium-free and ligand-free conditions. Cu2O nanoparticles could activate phenylacetylene to produce copper(I) acetylide compounds, which subsequently react with aryl halides to form the corresponding disubstituted alkynes. The catalyst also shows a high stability and there is only slight decrease of activity after five cycles.
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      PubDate: 2017-08-02T22:55:39Z
       
  • 2D-QSAR modeling on the catalytic activities of
           2-azacyclyl-6-aryliminopyridylmetal precatalysts in ethylene
           oligomerization
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Wenhong Yang, Jun Yi, Zhifeng Ma, Wen-Hua Sun
      The two dimensional quantitative structure-activity relationship (2D-QSAR) approach was used to investigate the catalytic activities for a date set of 58 2-azacyclyl-6-aryliminopyridylmetal complexes. Molecular descriptors were derived based on the optimized structure of complexes and selected by partial least square method (PLS). The final QSAR model containing 18 descriptors shows good predictive ability for the training set of 36 complexes (R 2 =0.913, Q 2 =0.873) and test set of 16 complexes (R t 2 =0.971). Then 20 new complexes were designed and predicted. The results indicate that the net charge on central metal and N atoms and also the bulky substituents are favor to the catalytic activities.
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      PubDate: 2017-08-02T22:55:39Z
       
  • Deactivation of SiO2 supported Ni catalysts by structural change in the
           direct internal reforming reaction of molten carbonate fuel cell
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Won-Jun Jang, Hak-Min Kim, Jae-Oh Shim, Seong-Yeun Yoo, Kyung-Won Jeon, Hyun-Suk Na, Yeol-Lim Lee, Da-We Lee, Hyun-Seog Roh, Wang Lai Yoon
      A direct internal reforming (DIR) reaction for a molten carbonate fuel cell (MCFC) is carried out using SiO2 supported catalysts, which are known to be a highly stable in catalytic reactions. The SiO2 supported Ni catalysts rapidly deactivate in DIR-MCFC. To elucidate the mechanism of the catalyst deactivation, various characteristic analyses (XRD, BET, H2-chemisorption, FT-IR, and SEM) of calcined and used catalysts are employed. The co-existence of H2O and K causes the formation of the non-active nickel oxide and silica hydrate resulting in the significant decrease of Ni dispersion and BET surface area.
      Graphical abstract image

      PubDate: 2017-08-02T22:55:39Z
       
  • Thin-felt NiO-Al2O3/FeCrAl-fiber catalyst for high-throughput catalytic
           oxy-methane reforming to syngas
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Ruijuan Chai, Pengjing Chen, Zhiqiang Zhang, Guofeng Zhao, Ye Liu, Yong Lu
      Thin-felt NiO-Al2O3/FeCrAl-fiber catalysts engineered from micro- to macro-scales are developed for the high-throughput catalytic oxy-methane reforming to syngas. Crystallization-driven self-assembly process is used to prepare an Al(OH)3/FeCrAl-fiber support (15wt% Al(OH)3). NiO of ~3wt% is then highly dispersed onto above support via incipient wetness impregnation method followed by a calcination treatment. Such catalyst achieves a high CH4 conversion of 88.6% with 90.7%/93.2% selectivity to H2/CO at 700°C and a high gas hourly space velocity of 80Lg−1 h−1, and is stable for at least 30h without carbon deposit but a slight sintering. In contrast, a reference catalyst of NiO/FeCrAl-fiber shows a fast deactivation within only 6h.
      Graphical abstract image

      PubDate: 2017-08-02T22:55:39Z
       
  • One-step synthesis of urchinlike SnS/SnS2 heterostructures with superior
           visible-light photocatalytic performance
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Kaili Yao, Jun Li, Shaoyun Shan, Qingming Jia
      Urchinlike SnS/SnS2 p-n heterogeneous composite photocatalysts were successfully synthesized by a one-step solvothermal method. The samples are characterized by XRD, XPS, SEM, TEM, BET and DRS. SnS/SnS2 (Sn/S=39.87:60.13) heterostructure exhibited the higher photocatalytic activity, the removal efficiency of MO was 83.25% in illuminate 60min, and degradation reaction was calculated by adopting the pseudo-first-order reaction kinetics, the k value was 3.351×10−2 min−1 which was higher than pure SnS and pure SnS2 under visible light irradiation. The mechanism of enhanced photocatalytic activity has been discussed through scavenger experiments. In addition, the main active species for degradation of methyl orange (MO) were investigated using electron spin resonance (ESR) measurement and the possible degradation pathway of MO was also presented.

      PubDate: 2017-08-02T22:55:39Z
       
  • Selective allylic oxidation of cyclohexene catalyzed by nanostructured
           Ce-Sm-Si materials
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Bolla Govinda Rao, Putla Sudarsanam, P.R.G. Nallappareddy, M. Yugandhar Reddy, T. Venkateshwar Rao, Benjaram M. Reddy
      The oxidation of cyclohexene was studied using nanostructured CeO2, CeO2/SiO2, CeO2-Sm2O3, and CeO2-Sm2O3/SiO2 catalysts. The CeO2-Sm2O3/SiO2 catalyst shows ~96% cyclohexene conversion and ~91% selectivity to allylic products, namely, 2-cyclohexen-1-one (~53%) and 2-cyclohexen-1-ol (~38%) owing to favorable redox (oxygen vacancies) and acid sites stimulated by synergistic interactions of dopant (Sm) and support (SiO2) with CeO2. In contrast, only ~40, ~55, and ~78% of cyclohexene conversions were observed, respectively, over CeO2, CeO2/SiO2, and CeO2-Sm2O3 catalysts. With the increase of reaction time, temperature, and molar ratio of cyclohexene/oxidant, the conversion of cyclohexene and the selectivity of 2-cyclohexen-1-one are increased considerably.
      Graphical abstract image

      PubDate: 2017-08-02T22:55:39Z
       
  • Solvent-free selective hydrogenation of 1,5-cyclooctadiene catalyzed by
           palladium incorporated TUD-1
    • Abstract: Publication date: November 2017
      Source:Catalysis Communications, Volume 101
      Author(s): Mhamed Benaissa, Abdullah M. Alhanash, Murad Eissa, Mohamed S. Hamdy
      Palladium (Pd) was incorporated into TUD-1 mesoporous siliceous material by using one-pot synthesis procedure. The catalytic activity of the prepared samples was evaluated in the selective hydrogenation of 1,5-cyclooctadiene (COD) at 80°C in a solvent-free condition. Pd-TUD-1 showed >95% conversion of COD with a selectivity>90% towards cyclooctene (COE).
      Graphical abstract image

      PubDate: 2017-08-02T22:55:39Z
       
 
 
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