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  Subjects -> CHEMISTRY (Total: 881 journals)
    - ANALYTICAL CHEMISTRY (54 journals)
    - CHEMISTRY (616 journals)
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CHEMISTRY (616 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 14)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 27)
ACS Catalysis     Hybrid Journal   (Followers: 44)
ACS Chemical Neuroscience     Hybrid Journal   (Followers: 22)
ACS Combinatorial Science     Hybrid Journal   (Followers: 23)
ACS Macro Letters     Hybrid Journal   (Followers: 26)
ACS Medicinal Chemistry Letters     Hybrid Journal   (Followers: 41)
ACS Nano     Hybrid Journal   (Followers: 290)
ACS Photonics     Hybrid Journal   (Followers: 14)
ACS Symposium Series     Full-text available via subscription  
ACS Synthetic Biology     Hybrid Journal   (Followers: 24)
Acta Chemica Iasi     Open Access   (Followers: 5)
Acta Chimica Slovaca     Open Access   (Followers: 2)
Acta Chimica Slovenica     Open Access   (Followers: 1)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access  
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 7)
Acta Scientifica Naturalis     Open Access   (Followers: 3)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 8)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 9)
Adsorption Science & Technology     Open Access   (Followers: 6)
Advanced Functional Materials     Hybrid Journal   (Followers: 59)
Advanced Science Focus     Free   (Followers: 5)
Advances in Chemical Engineering and Science     Open Access   (Followers: 68)
Advances in Chemical Science     Open Access   (Followers: 18)
Advances in Chemistry     Open Access   (Followers: 22)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 19)
Advances in Drug Research     Full-text available via subscription   (Followers: 24)
Advances in Environmental Chemistry     Open Access   (Followers: 7)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 9)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 16)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 12)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 25)
Advances in Nanoparticles     Open Access   (Followers: 15)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 17)
Advances in Polymer Science     Hybrid Journal   (Followers: 44)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 20)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Science and Technology     Full-text available via subscription   (Followers: 12)
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 3)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 8)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Al-Kimia : Jurnal Penelitian Sains Kimia     Open Access  
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 2)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 66)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 21)
American Journal of Chemistry     Open Access   (Followers: 31)
American Journal of Plant Physiology     Open Access   (Followers: 11)
American Mineralogist     Hybrid Journal   (Followers: 15)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 169)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 253)
Annales UMCS, Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 5)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 3)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 4)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 9)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 14)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Open Access   (Followers: 2)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 9)
Applied Spectroscopy     Full-text available via subscription   (Followers: 24)
Applied Surface Science     Hybrid Journal   (Followers: 32)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 2)
Atomization and Sprays     Full-text available via subscription   (Followers: 4)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access  
Biochemical Pharmacology     Hybrid Journal   (Followers: 10)
Biochemistry     Hybrid Journal   (Followers: 364)
Biochemistry Insights     Open Access   (Followers: 6)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 10)
Bioinspired Materials     Open Access   (Followers: 5)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 2)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access   (Followers: 2)
Biomacromolecules     Hybrid Journal   (Followers: 22)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
BioNanoScience     Partially Free   (Followers: 5)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 133)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 87)
Bioorganic Chemistry     Hybrid Journal   (Followers: 10)
Biopolymers     Hybrid Journal   (Followers: 18)
Biosensors     Open Access   (Followers: 2)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 1)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 1)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal   (Followers: 1)
C - Journal of Carbon Research     Open Access   (Followers: 3)
Cakra Kimia (Indonesian E-Journal of Applied Chemistry)     Open Access  
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 2)
Canadian Journal of Chemistry     Hybrid Journal   (Followers: 10)
Canadian Mineralogist     Full-text available via subscription   (Followers: 6)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 70)
Catalysis for Sustainable Energy     Open Access   (Followers: 8)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 8)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 10)
Cellulose     Hybrid Journal   (Followers: 7)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
ChemCatChem     Hybrid Journal   (Followers: 8)
Chemical and Engineering News     Free   (Followers: 22)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 74)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 26)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Hybrid Journal   (Followers: 22)
Chemical Reviews     Hybrid Journal   (Followers: 194)
Chemical Science     Open Access   (Followers: 26)
Chemical Technology     Open Access   (Followers: 28)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 5)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 57)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 24)
ChemInform     Hybrid Journal   (Followers: 8)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 7)
Chemistry & Biology     Full-text available via subscription   (Followers: 32)
Chemistry & Industry     Hybrid Journal   (Followers: 7)
Chemistry - A European Journal     Hybrid Journal   (Followers: 157)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 16)
Chemistry and Materials Research     Open Access   (Followers: 21)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry Education Research and Practice     Free   (Followers: 5)
Chemistry in Education     Open Access   (Followers: 9)
Chemistry International     Open Access   (Followers: 3)
Chemistry Letters     Full-text available via subscription   (Followers: 44)
Chemistry of Materials     Hybrid Journal   (Followers: 262)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry World     Full-text available via subscription   (Followers: 20)
Chemistry-Didactics-Ecology-Metrology     Open Access   (Followers: 1)
ChemistryOpen     Open Access   (Followers: 1)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 4)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 14)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 12)
ChemPlusChem     Hybrid Journal   (Followers: 2)
ChemTexts     Hybrid Journal  
CHIMIA International Journal for Chemistry     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 11)
Chromatographia     Hybrid Journal   (Followers: 24)
Chromatography     Open Access   (Followers: 2)
Chromatography Research International     Open Access   (Followers: 6)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Cogent Chemistry     Open Access   (Followers: 2)
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 11)
Colloids and Interfaces     Open Access  
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 6)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
Combustion Science and Technology     Hybrid Journal   (Followers: 22)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 2)
Communications Chemistry     Open Access  
Composite Interfaces     Hybrid Journal   (Followers: 7)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 1)
Comptes Rendus Chimie     Full-text available via subscription  
Comptes Rendus Physique     Full-text available via subscription   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 9)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 12)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 10)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 4)
Copernican Letters     Open Access   (Followers: 1)
Corrosion Series     Full-text available via subscription   (Followers: 6)
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 6)
Croatica Chemica Acta     Open Access  
Crystal Structure Theory and Applications     Open Access   (Followers: 4)
CrystEngComm     Full-text available via subscription   (Followers: 13)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Chromatography     Hybrid Journal  
Current Green Chemistry     Hybrid Journal   (Followers: 1)
Current Metabolomics     Hybrid Journal   (Followers: 5)
Current Microwave Chemistry     Hybrid Journal  
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 14)
Current Research in Chemistry     Open Access   (Followers: 9)
Current Science     Open Access   (Followers: 71)
Current Trends in Biotechnology and Chemical Research     Open Access   (Followers: 3)
Dalton Transactions     Full-text available via subscription   (Followers: 23)
Detection     Open Access   (Followers: 3)
Developments in Geochemistry     Full-text available via subscription   (Followers: 2)
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Dislocations in Solids     Full-text available via subscription  

        1 2 3 4 | Last

Journal Cover
Catalysis Surveys from Asia
Journal Prestige (SJR): 0.973
Citation Impact (citeScore): 3
Number of Followers: 3  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1574-9266 - ISSN (Online) 1571-1013
Published by Springer-Verlag Homepage  [2350 journals]
  • Bifunctional Electro-Catalysts Stemmed from Ln-Substituted
           Monovacant/Saturated Keggin Polyoxotungstates and Cu-Terpyridine Chlorides
           
    • Abstract: Three inorganic–organic hybrids based on monovacant/saturated polyoxotungstates and 3d-4f metal chlorides: [Cu2(tpy)2][Sm(H2O)3K(α-HSiW11O39)]Cl·2H2O (1), [Cu2(tpy)2][Eu(H2O)3K(α-HSiW11O39)]Cl·2H2O (2), Cu4Cl4(tpy)4(α-SiW12O40)]·2H2O (3), (tpy = 2,2′:6′,2″-terpyridine), were fabricated in the same POW/Ln/Cu-tpy reaction systems by adjusting pH. Compounds 1 and 2 display 1D circle-connecting-circle chain structure featured by {Ln–α–SiW11} polyoxoanion clusters and {Cu/tpy} units. Compound 3 with 3D supramolecular structure consists of saturated α-SiW12 clusters and [Cu2Cl2(tpy)2]2+ motifs. Compounds 1–3 exhibit bifunctional electro-catalytic behaviors for not merely reduction of nitrite but also oxidation of ascorbic acid. Electrocatalytic tests make clear that Sm-substituted hybrid based on POWs exhibits better activity than that for Eu-substitued/statured Keggin hybrids for electrocatalytic reduction of nitrite, statured Keggin hybrid shows better electro-catalytic performance for oxidations of ascorbic acid than those for Ln-substituted hybrids. The differences of electro-catalytic performances among three hybrids should be attributing to the distinctions of structures and electrochemical properties. Graphical Three inorganic-organic hybrids based on monovacant/saturated polyoxotungstates and 3d–4f metal chlorides were fabricated in the same POM/Ln/Cu-tpy reaction systems by adjusting pH. Compounds 1 and 2 display 1D circle-connecting-circle chain structure featured by {Ln–α–SiW11} polyxoanion clusters and {Cu/tpy} units, Compound 3 with 3D supramolecular structure consists of saturated α-SiW12 clusters and [Cu2Cl2(tpy)2]2+ motifs. Cyclic voltammetries of n-CPEs (n = 1–3) displayed bifunctional electrocatalytic activities toward reduction of nitrite and oxidation of ascorbic acid.
      PubDate: 2018-05-30
      DOI: 10.1007/s10563-018-9247-4
       
  • Research Progress in the Selective Catalytic Reduction of NO x by H 2 in
           the Presence of O 2
    • Abstract: Abstract As one environmentally benign technology for the removal of NOx, the selective catalytic reduction of NOx by hydrogen (H2-SCR) in the presence of oxygen has attracted more and more attention. Recent progress in the H2-SCR of NOx has been reviewed with the focus on H2-SCR catalysts and the reaction mechanisms. The effects of the reaction conditions (H2, O2, H2O, CO and SO2) on the performance of H2-SCR catalysts have been discussed. Finally, the future research direction for the H2-SCR of NOx has been proposed.
      PubDate: 2018-05-29
      DOI: 10.1007/s10563-018-9248-3
       
  • Catalytic Hydrogenation of Levulinic Acid into Gamma-Valerolactone Over
           Ni/HZSM-5 Catalysts
    • Authors: Di Zhang; Yun-Peng Zhao; Xing Fan; Zhong-Qiu Liu; Rui-Yu Wang; Xian-Yong Wei
      Abstract: Abstract A series of Ni/HZSM-5 catalysts with different Ni-loadings and Si/Al ratios were prepared by incipient wetness impregnation and employed for catalytic hydrogenation of levulinic acid (LA) to gamma-valerolactone (GVL). Their physicochemical properties were characterized by X-ray diffraction, nitrogen adsorption–desorption, X-ray photoelectron spectrometer, temperature-programmed desorption of ammonia,transmission electron microscopy, temperature-programmed reduction of hydrogen, and pyridine-adsorbed infrared spectroscopy. The diffraction peaks assigned to Ni phase were not observed, implying that nickel particles were small and had a high dispersion on the supports. The catalysts with a strong acidity and the appropriate ratio of Brönsted (B) acid sites to Lewis (L) acid sites (B/L = 4.9) show an excellent activity and selectivity for the hydrogenation of LA to GVL. High conversion of LA and selectivity towards GVL were achieved over 5 wt% Ni/HZSM-5-50. The maximum GVL yield of 100% over 5 wt% Ni/HZSM-5-50 was obtained under the optimized reaction conditions of 210 °C, 2 h, and 3 MPa initial hydrogen pressure.
      PubDate: 2018-05-22
      DOI: 10.1007/s10563-018-9246-5
       
  • Cu 2 O/Graphene as an Efficient and Ligand Free Heterogeneous Catalyst for
           Ullmann Coupling of N–H Containing Compounds with Aryl Halides
    • Authors: Yibing Wang; Jingru Wang; Bing Wang; Yingyong Wang; Guoqiang Jin; Xiangyun Guo
      Abstract: Abstract The graphene supported Cu2O nanoparticles were prepared via a two-step liquid-phase method and exhibited high catalytic activity and stability for the Ullmann coupling of aryl halides with N–H containing compounds under mild and ligand-free conditions. The yield of C–N cross-coupling of imidazole with iodobenzene reached up to 97% with 0.5 mol% Cu (vs. reported 5–10 mol%). The high activity and stability of Cu2O/graphene are probably due to the unique structure of graphene, which can make Cu2O nanoparticles highly dispersed and prevent them from aggregation and oxidation.
      PubDate: 2018-05-17
      DOI: 10.1007/s10563-018-9245-6
       
  • Controlled Synthesis of TiO 2 Shape and Effect on the Catalytic
           Performance for Selective Catalytic Reduction of NO x with NH 3
    • Authors: Luyao Zong; Jiyi Zhang; Gongxuan Lu; Zhicheng Tang
      Abstract: Abstract In this paper, the shapes of TiO2 were regulated by changing the solvent and hydrothermal temperature. CeO2–WO3/TiO2 catalysts were further synthesized by impregnation method and used for selective catalytic reduction (SCR) of NOx. By a series of regulations, the SCR performance was improved by the further modulation of TiO2 shape. The results showed that with the hydrothermal temperature increase from 80 to 200 °C, and the shape of catalysts emerged particle state, rod-like structure, flower-like structure and large particle state, respectively. The formation process of flower-like TiO2 was proposed according to the shape change with the increase of hydrothermal temperature. Prominently, the shape of TiO2 precursor would change the crystallographic plane of CeO2–WO3/TiO2-A catalysts. When the hydrothermal temperature was 120 °C, the catalysts showed the best SCR performance. This might be due to the high surface atomic ratio of Oα/(Oα + Oβ) and the high transformation of Ce3+ and Ce4+, which were beneficial for the SCR performance. CeO2–WO3/TiO2-A-120 also exhibited an excellent resistance of H2O. However, when enduring the SO2 or both enduring the SO2 and H2O, the activity of catalysts had an obvious decrease due to the production of Ce2(SO4)3.
      PubDate: 2018-04-26
      DOI: 10.1007/s10563-018-9244-7
       
  • 1,3-Butadiene Production from Bioethanol and Acetaldehyde over Zirconium
           Oxide Supported on Series Silica Catalysts
    • Authors: Meixiang Gao; Minhua Zhang; Haoxi Jiang
      Abstract: In this paper a series of zirconium oxide supported on silica composite oxides were studied as catalysts for the production of 1,3-butadiene from bioethanol and acetaldehyde. The highest selectivity observed was 91.43%. Different silica materials with varied pore diameters in the range of 3.6–11.6 nm and the service life of the catalyst have been initially investigated. The catalysts were characterized by a nitrogen adsorption analysis, X-ray diffraction, scanning electron micrography and 29Si solid-state NMR spectroscopy. The catalytic results show that the pore sizes are important factors determining the activity when catalyst contains a subtle balance of the acid and base. Graphical
      PubDate: 2018-04-13
      DOI: 10.1007/s10563-018-9243-8
       
  • The Mechanism of Non-thermal Plasma Catalysis on Volatile Organic
           Compounds Removal
    • Authors: Bangfen Wang; Xiaoxin Xu; Weicheng Xu; Ni Wang; Hailin Xiao; Yuhai Sun; Haomin Huang; Lian Yu; Mingli Fu; Junliang Wu; Limin Chen; Daiqi Ye
      Abstract: Abstract Non-thermal plasma (NTP) catalysis has attracted widespread attention in volatile organic compounds (VOCs). Combining NTP with heterogeneous catalyst has been proved to reduce the formation of unwanted by-products and improve the energy efficiency of the process. The mechanisms of interaction with plasma and catalyst and VOCs oxidation in plasma catalysis are particularly hot research topic. This paper reviewed the mechanism of non-thermal plasma catalysis on volatile organic compounds removal. In the first part, the interaction between plasma and catalyst is disscussed. And the different catalysis systems and discharge types are presented in the second part. In the third part, attention is given to the influence of critical parameters on the removal processes. Finally, based on a large number of literatures, an extended review is presented detailly on the treatment of VOCs with plasma-catalysis system including the oxidation pathways. Moreover, future works of this promising technology are discussed.
      PubDate: 2018-03-26
      DOI: 10.1007/s10563-018-9241-x
       
  • Selective Catalytic Reduction of NO x with NH 3 on Cu-BTC-derived
           Catalysts: Influence of Modulation and Thermal Treatment
    • Authors: Haoxi Jiang; Shutian Wang; Caixia Wang; Yifei Chen; Minhua Zhang
      Abstract: Abstract In this work, copper-based metal organic frameworks Cu3(BTC)2 (BTC = 1,3,5-benzenetricarboxylatle), were applied in the conversion of toxic oxynitride into nitrogen at low temperature. Scanning electron microscope (SEM), thermal gravimetric analysis (TGA), X-ray photoelectron spectroscopy (XRD) and other characterization methods were employed to fully understand the properties of the catalysts. We introduced acetic acid into the synthesis process as the modulator of the crystal structure and morphology. The catalytic assessment indicated that compared with the prototype, modified Cu-MOFs materials obtain enhanced catalytic activity for the SCR reaction. Besides, several thermolysis experiments were conducted to explain structure–function relationship.
      PubDate: 2018-03-17
      DOI: 10.1007/s10563-018-9242-9
       
  • Efficient Catalytic Removal of Formaldehyde over Ag/Co 3 O 4 –CeO 2
           Prepared by Different Method
    • Authors: Suhong Lu; Canchang Chen; Xue Wang; Shuhan Wei; Qinyu Zhu; Fenglin Huang; Kelun Li; Xuefeng Zhou; Lulu He; Yanxiong Liu; Fanjue Pang
      Abstract: Abstract A series of Co3O4–CeO2 supported Ag catalysts were prepared by different methods and the catalytic properties of these catalysts were investigated for the catalytic removal of formaldehyde (HCHO). The Ag/Co3O4–CeO2–H catalyst calcined in a O2/N2 flow and then reduced in a H2/N2 stream exhibited excellent catalytic activity, over which 100% HCHO conversion was achieved at a temperature as low as 60 °C. In addition, the Ag/Co3O4–CeO2–H catalyst also displayed high stability in lifetime testing. Based on a variety of physical–chemical characterization results, it is demonstrated that the larger specific area, easier reducibility and abundant active surface oxygen species served as essential roles in the catalytic removal of HCHO for Ag/Co3O4–CeO2–H catalyst.
      PubDate: 2018-02-05
      DOI: 10.1007/s10563-018-9240-y
       
  • An Overview of Metal Acetylacetonates: Developing Areas/Routes to New
           Materials and Applications in Organic Syntheses
    • Authors: Ravinderpal Kour Sodhi; Satya Paul
      Abstract: In this review, we discuss the nature and bonding, role of metal acetylacetonates as precursors for nanoparticle research, polymer science, catalysis and their mechanistic aspects, which we believe to provide an illustrative overview of current research directions in this rapidly developing field. The chosen examples within this review reflect the remarkable broadness of nanoparticle research, polymer and applications of metal acetylacetonates as catalysts in organic syntheses. The purpose of this review is to provide recent advancements of several catalytic reactions employing well defined metal enolate complexes. Metal enolates are used in a plethora of catalysed reactions. Several catalytic reactions have been highlighted in this review to show where metal enolate complexes have played a significant role in recent years. The ultimate goal of this effort is towards the development of catalysts that impart the selectivities, reactivity, and atom economy needed for cost-effective approaches to a variety of critical chemical transformations. Graphical
      PubDate: 2017-12-30
      DOI: 10.1007/s10563-017-9239-9
       
  • High-Efficiency Environmental-Friendly Fe–W–Ti Catalyst for Selective
           Catalytic Reduction of NO with NH 3 : The Structure–Activity
           Relationship
    • Authors: Kun Zhao; Weiliang Han; Zhicheng Tang; Jiangyin Lu; Xun Hu
      Abstract: Abstract Iron-based catalysts are nontoxic and have outstanding medium-temperature activity, which are considered as potential catalysts for the selective catalytic reduction of NOx with NH3 (NH3-SCR). In this work, Fe (0.2)-W (0.05)-Ti catalyst prepared by deposition–precipitation exhibited over 90% NOx conversion within the range of 280–420 °C and excellent resistance to SO2 or H2O. The excellent catalytic performance was due to the high proportion of Fe2+/(Fe2+ + Fe3+) and Oads/(Oads + Olat) ratio and abundant surface acid sites. However, the catalyst lost part low-temperature catalytic performance after hydrothermal aging at 670 °C for 64 h. The surface area, proportion of Fe2+/(Fe2+ + Fe3+) and Oads/(Oads + Olat) decreased significantly after aged. As a result, the lack of sufficiently active site to produce NO2 resulted in the significant decrease for NOx conversion at low-temperature section. Simultaneously, the decline of the surface acidity, especially the strong acid, meant that the adsorption capacity of the catalyst under high temperature weakened and the NO conversion corresponding declined.
      PubDate: 2017-12-02
      DOI: 10.1007/s10563-017-9238-x
       
  • Recent Progress on Establishing Structure–Activity Relationship of
           Catalysts for Selective Catalytic Reduction (SCR) of NO x with NH 3
    • Authors: Xiaosheng Huang; Guodong Zhang; Gongxuan Lu; Zhicheng Tang
      Abstract: Abstract Catalytic elimination is an important technique to reduce the emission of atmospheric molecular contaminants (such as NOx) efficiently. Selective catalytic reduction (SCR) is one of the most important nitrogen oxide (NOx) control technologies in the world, and catalyst plays a greatly important role in SCR process. In this field, the novel catalysts and preparation methods have attracted more and more attention in recent years due to their excellent catalytic performance. It is well accepted that catalytic performance is significantly dependent on the supports, active sites, and interaction of support and active component of the catalysts. In this paper, we present a brief review on the preparation methods of different kinds of SCR catalysts in recent years and propose some perspectives for further development. Based on the report of published literatures, the structure–activity relationship between support and active sites is deeply analyzed. Meanwhile, we review the possible catalytic mechanism, and further clarify the nature of the catalytic reactions.
      PubDate: 2017-11-14
      DOI: 10.1007/s10563-017-9237-y
       
  • Theoretical Investigation of Reverse Water Gas Shift Reaction Catalyzed by
           Ruthenium Halogen Carbonyl Complexes
    • Authors: Wenli Li; Sibei Guo; Ling Guo
      Abstract: Abstract In this paper we present theoretical study of the reverse water gas shift (RWGS) reaction catalyzed by ruthenium halogen carbonyl complexes. Three mechanisms, including hydrogen chloride, formic acid and oxidation–reduction mechanism, have been explored by density functional theory. The calculations indicate that the oxidation–reduction mechanism contributes to the TDI and TDTS in the ESM TOF calculations. Bimetallic catalysts would be likely to be more highly active than monometallic catalyst for the RWGS reaction. Among bimetallic catalysts studied, both bimetallic catalysts [Ru(μ-Cl)Cl(CO)3]2 and [Ru(μ-CO)Cl(CO)3]2 shows higher activity than [Ru(μ-Cl)(CO)4]2 catalyst with [Ru(μ-CO)Cl(CO)3]2 considering as the most efficient catalyst for RWGS reaction.
      PubDate: 2017-09-22
      DOI: 10.1007/s10563-017-9236-z
       
  • Production of Biodiesel Through Esterification Reaction Using Choline
           Exchanging Polytungstoboronic Acids as Temperature-Responsive Catalysts
    • Authors: Siqi Yan; Tong Tong; Yue Li; Shifa Ullah Khan; Jing Zhao; Shengtian Wang; Xiaohong Wang
      Abstract: Abstract High proton content polytungstoboronic acid H7BW11TiO40 (abbreviated as H7BW11Ti) had been prepared through titanium mono-substituted of H5BW12O40, which was evaluated in esterification of palmitic acid with methanol. H7BW11Ti could promote esterification reaction with almost 100% conversion of 417 mol/mol h TOF within very short time of 1 h at methanol/acid ratio of 25:1 under reaction temperature of 65 °C, which was attributed to the higher Brønsted acidity and cooperation of Lewis acidic site generating from Ti substituent. Limitation by its homogeneous performance, solidification of H7BW11Ti was designed via partial exchanging protons with choline cation (abbreviated as Ch+) to prepare a series of [(CH3)3NCH2CH2OH]nH7−nBW11TiO40 (abbreviated as ChnH7−nBW11Ti, n = 0 ~ 7). Among all solid catalysts, the highest efficiency had been achieved by with 99.0% conversion and 429 mol/mol h TOF within 50 min at 65 °C at methanol/acid ratio of 15:1. The comparable activity was attributed to the cooperation of Ch+—self-assembling to form nanoreactor with amphiphilic surrounding to concentrate substrates and to resist to water-poison, temperature-responsive property to control form changing between heterogeneous to homogenous. This temperature-responsive HPA catalyst was available for production of biodiesel through esterification reaction. In addition, Separation of such heteropolyacid catalysts was easy by the lowering the reaction temperature to room temperature without appreciable loss of its high performance, which were reused for more than six times.
      PubDate: 2017-08-24
      DOI: 10.1007/s10563-017-9232-3
       
  • The Solid-State-Grinding Synthesis of Maganese-Modified Cobalt Oxides and
           Application in the Low-Temperature CO Preferential Oxidation in H 2 -Rich
           Gases
    • Authors: Changxiang Liu; Lei Gong; Meijuan Lu; Tingting Sun; Runying Dai; Qian Liu; Xigen Huang; Guangbin Liu; Zhong Huang
      Abstract: Abstract A series of MnOx modified cobalt oxides with different atomic molar ratios of Mn/(Mn + Co) were prepared by a soft reactive grinding route and investigated for CO preferential oxidation in H2. It was found that as-prepared Mn-doped cobalt oxides exhibited superior activity compared to the single constituted oxides, other Mn–Co–O mixed oxides synthesized by solution-based route, and other grinding-derived mixed metal oxides M–Co–O (M = Zn, Ni, Cu, Fe). The grinding-derived MnCo10 catalyst with Mn/(Mn + Co) molar ration of 10% showed the best CO oxidation activity and higher selectivity at low temperature. The surface richness of Co3+ was not found as increasing the Mn molar ratio in the present work. However, the incoporation of MnOx with proper amount into Co3O4 could produce high surface area, high structure defects, and rich surface active oxygen species, while the ability to supply the active oxygen species was suggested to play the crucial role in promoting the catalytic performance of Mn–Co–O mixed oxides.
      PubDate: 2017-08-03
      DOI: 10.1007/s10563-017-9235-0
       
  • Synthesis and Catalytic Property of Fibrous Titanium-Containing Graphite
           Oxide
    • Authors: Cheng Pan; Benhua Huang; Xiaoyong Li; Hua Zhu; Donghua Zhang; Aqun Zheng; Yu Li; Yang Sun
      Abstract: Abstract A new layered graphite oxide is synthesized by a two-step oxidation of commercial graphite powders, which is further covalently modified by a titanium complex in order for oxidation of alkenes. Characterizations reveal the present graphite oxide is thicker than classical graphene oxide, but shows fibrous morphology after modification of titanium complex. Furthermore, the composition and morphology of synthetic composite are highly relative to the heating condition in preparation. In catalysis, high conversions of alkenes as well as various oxidized products are obtained by using available and green terminal oxidants. Lastly, a composite catalyst is reused for nine rounds in oxidation of R-(+)-limonene, approving its satisfactory stability for recycling. This work provides a highly promising catalytic material, showing values for the design of solid catalysts.
      PubDate: 2017-07-29
      DOI: 10.1007/s10563-017-9233-2
       
  • Effect of Calcination Temperature on the Catalytic Oxidation of
           Formaldehyde Over Co 3 O 4 –CeO 2 Catalysts
    • Authors: Fenglin Huang; Canchang Chen; Fan Wang; Bing Wang; Lulu Zhang; Suhong Lu; Kelun Li
      Abstract: Abstract The effect of calcination temperature (350–650 °C) on the structure and catalytic activity of Co3O4–CeO2 mixed oxides prepared by sol–gel method was investigated by XRD, H2-TPR, O2-TPD and formaldehyde (HCHO) oxidation. The Co3O4–CeO2 calcined at 450 °C (Co3O4–CeO2-450) exhibited the best performance, showing that the complete oxidation of HCHO was achieved at temperature as low as 80 °C. The results of characterizations revealed that the Co3O4–CeO2-450 had excellent catalytic activity due to the larger specific surface area, the best reducibility and more abundant surface active oxygen species.
      PubDate: 2017-07-08
      DOI: 10.1007/s10563-017-9234-1
       
  • Recent Progress of Synthesis and Application in Au@MOFs Hybrid Materials
    • Authors: Yi Liu; Xinzhi Chen; Mingqiao Zhu; Umsa Jameel
      Abstract: Abstract The combination of gold nanoparticles and metal–organic frameworks is one of the new directions of current research. It has applications in many aspects, especially as a catalyst for a variety of reactions. Therefore, this paper describes recent progress of synthesis and application in Au@MOFs hybrid materials.
      PubDate: 2017-06-28
      DOI: 10.1007/s10563-017-9231-4
       
  • Hydrogen Production by Steam Reforming of Ethanol Over Mesoporous Ni–Al
           2 O 3 –ZrO 2 Catalysts
    • Authors: Ji Hwan Song; Seung Ju Han; In Kyu Song
      Abstract: Abstract This review paper reports the recent progress concerning the application of nickel–alumina–zirconia based catalysts to the ethanol steam reforming for hydrogen production. Several series of mesoporous nickel–alumina–zirconia based catalysts were prepared by an epoxide-initiated sol–gel method. The first series comprised Ni–Al2O3–ZrO2 xerogel catalysts with diverse Zr/Al molar ratios. Chemical species maintained a well-dispersed state, while catalyst acidity decreased with increasing Zr/Al molar ratio. An optimal amount of Zr (Zr/Al molar ratio of 0.2) was required to achieve the highest hydrogen yield. In the second series, Ni–Al2O3–ZrO2 xerogel catalysts with different Ni content were examined. Reducibility and nickel surface area of the catalysts could be modulated by changing nickel content. Ni–Al2O3–ZrO2 catalyst with 15 wt% of nickel content showed the highest nickel surface area and the best catalytic performance. In the catalysts where copper was introduced as an additive (Cu–Ni–Al2O3–ZrO2), it was found that nickel dispersion, nickel surface area, and ethanol adsorption capacity were enhanced at an appropriate amount of copper introduction, leading to a promising catalytic activity. Ni–Sr–Al2O3–ZrO2 catalysts prepared by changing drying method were tested as well. Textural properties of Ni–Sr–Al2O3–ZrO2 aerogel catalyst produced from supercritical drying were enhanced when compared to those of xerogel catalyst produced from conventional drying. Nickel dispersion and nickel surface area were higher on Ni–Sr–Al2O3–ZrO2 aerogel catalyst, which led to higher hydrogen yield and catalyst stability over Ni–Sr–Al2O3–ZrO2 aerogel catalyst.
      PubDate: 2017-05-31
      DOI: 10.1007/s10563-017-9230-5
       
  • Highly Efficient Mesoporous V 2 O 5 /WO 3 –TiO 2 Catalyst for Selective
           Catalytic Reduction of NO x : Effect of the Valence of V on the Catalytic
           Performance
    • Authors: Luyao Zong; Fang Dong; Guodong Zhang; Weiliang Han; Zhicheng Tang; Jiyi Zhang
      Abstract: Abstract Mesoporous WO3–TiO2 support was synthesized by hydrothermal method, mesoporous V2O5/WO3–TiO2 catalyst was synthesized by impregnation method and used for selective catalytic reduction (SCR) of NOx with a excellent NOx conversion at a wider operating temperature ranging from 200 to 460 °C. In the range of 260–440 °C, NOx conversion reached to 98.6%, and nearly a complete conversion. Even with the existence of 300 ppm SO2, NOx conversion was only a little decline. The catalyst was characterized by a series of techniques, such as XRD, BET, XPS, TEM, Raman and H2-TPR. It was concluded that V2O5/WO3–TiO2 catalyst was ascribe to antase TiO2, and also the high crystallinity of anatase TiO2 could improve the SCR performance. More interested, V2O5/WO3–TiO2 catalyst exhibited the typical mesoporous structure according to the BET results. In addition, the TEM results indicated that the active components of V and W were well-dispersed on the surface of TiO2, while the enhancement of dispersion could improve the activity of catalysts. More importantly, the concentration ratio of V4+/(V5+ + V4+ + V3+) performed the key role in improving the activity of V2O5/WO3–TiO2 catalyst.
      PubDate: 2017-05-05
      DOI: 10.1007/s10563-017-9229-y
       
 
 
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