Showing 961 - 980 results of 1,089 for search '"catalyst"', query time: 0.05s Refine Results
  1. 961

    Photocatalytic Behavior of Supported Copper Double Salt: The Role of Graphene Oxide by Marjan E. Shabestari, Juan Baselga, Olga Martin

    Published 2022-01-01
    “…The photodegradation process followed a pseudo–first-order kinetics for the bare catalysts, but the supported catalysts were best fitted to the Langmuir-Hinshelwood model. …”
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    Article
  2. 962

    Predicting electrocatalytic urea synthesis using a two-dimensional descriptor by Amy Wuttke, Alexander Bagger

    Published 2025-02-01
    “…To guide the identification of highly selective catalysts, we aim to provide new insight by analysing existing experimental data on the selectivity of transition metal catalysts towards electrochemically synthesized urea. …”
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    Article
  3. 963

    Low-Temperature Reverse Microemulsion Synthesis, Characterization, and Photocatalytic Performance of Nanocrystalline Titanium Dioxide by Zhang Liu, Zicong Jian, Jianzhang Fang, Xiaoxin Xu, Ximiao Zhu, Shuxing Wu

    Published 2012-01-01
    “…After aging for 6 h, the amorphous TiO2 began to change into anatase. The obtained catalysts, which were synthesized in microemulsions with weight ratios of n-hexanol/CTAB/water as 6 : 3 : 1 and calcined at 500°C, presented the highest photocatalytic degradation rate on methyl orange (MO), while the catalysts, which were aged at 65°C for 90 h, also exhibited an outstanding photocatalytic performance and a little higher than that of the commercial titania photocatalyst Degussa P25.…”
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  4. 964

    Adsorbate-driven dynamic active sites in stannosilicate zeolites by Xianfeng Yi, Yao Xiao, Changjiu Xia, Fengqing Liu, Yujia Liu, Yu Hui, Xin Yu, Yucai Qin, Wei Chen, Zhiqiang Liu, Lijuan Song, Anmin Zheng

    Published 2025-01-01
    “…Elucidating the nature of the active sites in heterogeneous catalysts is fundamental for understanding their reactivity and catalytic performances. …”
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    Article
  5. 965

    RESOURCES-ECONOMY TECHNOLOGY OF CASTINGS PRODUCTION OF NICKEL-CONTAINING CAST-IRONS by O. S. Komarov, I. B. Provorova, V. I. Volosatikov, N. I. Urbanovich

    Published 2008-05-01
    “…The technological process of the cast-iron IChH28H2 alloying by means of insertion into burden composition of briquettes of dead nickel-chromic catalysts is developed. This technology allows to carry out recycling of expensive metals such as nickel, and in that way to decrease the cost price of castings.…”
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  6. 966

    COFcap2, a recyclable tandem catalysis reactor for nitrogen fixation and conversion to chiral amines by Qianqian Zhu, Peijie Dong, Jiangyue Yu, Zhifang Wang, Ting Wang, Shan Qiao, Jinjin Liu, Shubo Geng, Yunlong Zheng, Peng Cheng, Michael J. Zaworotko, Zhenjie Zhang, Yao Chen

    Published 2025-01-01
    “…Abstract Two or more catalysts conducting multistep reactions in the same reactor, concurrent tandem catalysis, could enable (bio)pharmaceutical and fine chemical manufacturing to become much more sustainable. …”
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    Article
  7. 967

    PRODUÇÃO DE BIONAFTA A PARTIR DE ÁLCOOIS PRIMÁRIOS (C3-C5) VIA PROCESSOS DE DESIDROGENAÇÃO/DESIDRATAÇÃO CATALÍTICA by Adônis Coelho, Gustavo Metzker, Lívia P. de Lima, Eleni Gomes, Mauricio Boscolo

    Published 2025-02-01
    “…A sequence of dehydrogenation/dehydration reactions of homologous alcohols: propanol, butanol and pentanol was conducted using heterogeneous catalysts composed of mixed metal oxides basically of Mg and Al derived from hydrotalcites in the ratio M2+/Al3+ = 3, with 10 and 20% of the Mg substituted by Cu. …”
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    Article
  8. 968

    Cobalt and Nickel Complexes Bearing 2-(2-pyridyl)-Benzimidazole: Synthesis and Ethylene Oligomerization by Jian-Long Du, Li-Jun-Li

    Published 2005-01-01
    “…Treatment of the complexes with methylaluminoxane (MAO) leads to active catalysts for ethylene oligomerization. The oligomers were olefins from C2 to C6.…”
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  9. 969

    Catalytic β-Bromohydroxylation of Natural Terpenes: Useful Intermediates for the Synthesis of Terpenic Epoxides by Saadia Oubaassine, Angela Köckritz, Reinhard Eckelt, Andreas Martin, Mustapha Ait Ali, Larbi El Firdoussi

    Published 2019-01-01
    “…In a one-step procedure, various β-bromoalcohols were synthesized from natural terpenes in good to excellent yields. Using different catalysts, the reaction was carried out at room temperature, with H2O as nucleophile and N-bromosuccinimide as a bromine source under mild reaction conditions. …”
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  10. 970

    Novel Mesoporous Silica Materials with Hierarchically Ordered Nanochannel: Synthesis with the Assistance of Straight-Chain Alkanes and Application by Haidong Zhang, Xiaohong Li

    Published 2016-01-01
    “…The textural properties, particularly pore size, channel structure, morphology, and hierarchical structure of those MSM make them demonstrate peculiar effects in the immobilization of homogeneous catalysts.…”
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  11. 971

    Simulation of Surface Segregation in Nanoparticles of Pt-Pd Alloys by Jose Brito Correia, Ana Isabel de Sá

    Published 2025-01-01
    “…These nanocatalysts excel in direct methanol fuel cells (DMFCs) and direct ethanol fuel cells (DEFCs) by promoting alcohol oxidation and reducing CO poisoning. Pt-Pd catalysts are also being explored for their oxygen reduction reaction (ORR) on the cathodic side of fuel cells, showing higher activity and stability than pure platinum. …”
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  12. 972

    Preparation and Photocatalytic Activity of Ag Modified Ti-Doped-Bi2O3 Photocatalyst by Lilan Zhang, Junfeng Niu, Duo Li, Ding Gao, Jianghong Shi

    Published 2014-01-01
    “…The photocatalytic activities of the catalysts were evaluated for the degradation of crystal violet (CV) under UV light irradiation. …”
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  13. 973
  14. 974

    Photocatalytic Decomposition of Methyl Red Dye by Using Nanosized Zinc Oxide Deposited on Glass Beads in Various pH and Various Atmosphere by H. R. Ebrahimi, M. Modrek

    Published 2013-01-01
    “…This photodegradation was investigated in water in neutral, alkaline, and acidic media under external UV light irradiation by zinc oxide nanosized catalysts on granule glass. The effect of four atmosphere types including air, nitrogen, oxygen, and argon was investigated. …”
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  15. 975

    The Oxidation of 2,4,6-Trinitrotoluene with an Ozone-Oxygen Mixture: A Simple Method for Preparation of 1,3,5-Trinitrobenzene by Mohammad Ali Zarei, Hasan Tahermansouri, Yadollah Bayat

    Published 2013-01-01
    “…The oxidation of 2,4,6-trinitrotoluene (TNT) to 1,3,5-trinitrobenzene (TNB) in one step, 2,4,6-trinitrobenzoic acid (TNBA), and 2,4,6-trinitrobenzaldehyde (TNBAl) with an ozone-oxygen mixture in different solvents, catalysts, and temperatures has been investigated. …”
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  16. 976

    Alkene Cleavage Catalysed by Heme and Nonheme Enzymes: Reaction Mechanisms and Biocatalytic Applications by Francesco G. Mutti

    Published 2012-01-01
    “…Ozonolysis requires harsh conditions (−78°C, for a safe process) and reducing reagents in a molar amount, whereas the use of poisonous heavy metals such as Cr, Os, or Ru as catalysts is additionally plagued by low yield and selectivity. …”
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  17. 977

    Protein-Lipid Interactions in Different Meat Systems in the Presence of Natural Antioxidants – a Review by Hęś Marzanna

    Published 2017-03-01
    “…Attention is paid to the agents which may determine the reaction of amino acids with the products of lipid oxidation, i.e. the presence of catalysts or inhibitors in the environment, the presence of water, pH of the environment, temperature or reaction time. …”
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  18. 978

    Dioxazolones as electrophilic amide sources in copper-catalyzed and -mediated transformations by Seungmin Lee, Minsuk Kim, Hyewon Han, Jongwoo Son

    Published 2025-01-01
    “…Among the 3d transition metals, copper catalysts have been gaining increasing attention owing to their abundance, cost-effectiveness, and sustainability. …”
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  19. 979

    Zeolite Y: Synthesis, Modification, and Properties—A Case Revisited by Wolfgang Lutz

    Published 2014-01-01
    “…Y zeolites dealuminated by steaming were introduced as fluid-cracking catalysts in the year 1970. Extensive research has been done to develop suitable dealumination techniques, to investigate crystal structure, and to characterize catalytic behaviour. …”
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  20. 980

    A Review of Urea Pyrolysis to Produce NH3 Used for NOx Removal by Denghui Wang, Ning Dong, Yanqing Niu, Shien Hui

    Published 2019-01-01
    “…From the review, it could be concluded that although much research has been carried out, concentration was mainly in analysis of urea pyrolysis products and exploration of catalysts used to improve ammonia yields. Little work has been done on mechanism study and development of a kinetic model with high accuracy, which are still in great need nowadays.…”
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    Article