Showing 181 - 200 results of 1,089 for search '"catalyst"', query time: 0.06s Refine Results
  1. 181

    Co3O4 Catalysts on CeO2-ZrO2 Supports and Co3O4-CeO2 Catalysts on Al2O3/SiO2 Supports for the Oxidation of Propylene by Tien The Nguyen, Phuong Thi Mai Pham, Thang Minh Le, Isabel Van Driessche

    Published 2015-01-01
    “…Different compositions of Co3O4 catalysts on CeO2-ZrO2 solid solution (Ce0.9Zr0.1O2 and Ce0.8Zr0.2O2) have been studied for the oxidation of propylene. …”
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  2. 182
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  5. 185

    Catalytic Chemical Vapor Deposition of Methane to Carbon Nanotubes: Copper Promoted Effect of Ni/MgO Catalysts by Wen Yang, Yanyan Feng, Wei Chu

    Published 2014-01-01
    “…The Ni/MgO and Ni-Cu/MgO catalysts were prepared by sol-gel method and used as the catalysts for synthesis of carbon nanotubes by thermal chemical vapor deposition. …”
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  6. 186

    Bilayer electrified-membrane with pair-atom tin catalysts for near-complete conversion of low concentration nitrate to dinitrogen by Xuanhao Wu, Xiaoxiong Wang, Yunshuo Wu, Huimin Xu, Zhe Li, Rongrong Hong, Kali Rigby, Zhongbiao Wu, Jae-Hong Kim

    Published 2025-01-01
    “…The pair-atom design facilitates coupling of adsorbed N intermediates on adjacent Sn atoms to enhance N2 selectivity, which is challenging with conventional fully-isolated single-atom catalyst design. The EM ensures sufficient exposure of the catalysts and intensifies the catalyst interaction with NO3 − through mass transfer enhancement to provide more N intermediates for N2 coupling. …”
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  7. 187

    Influence of Solvents on the Electroactivity of PtAl/rGO Catalyst Inks and Anode in Direct Ethanol Fuel Cell by Thu Ha Thi Vu, Minh Dang Nguyen, Anh Tuan Ngoc Mai

    Published 2021-01-01
    “…This paper presents research on the effects of common solvents such as n-butyl acetate, isopropanol, and ethanol on the properties and electroactivity of catalyst ink based on PtAl/rGO. The inks prepared by mixing PtAl/rGO catalyst, Nafion solution (5 wt%), and solvent were coated on carbon cloth by the spin coating method. …”
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  8. 188

    A Comparative Study of Carbon Nanotubes Synthesized from Co/Zn/Al and Fe/Ni/Al Catalyst by Ezekiel Dixon Dikio

    Published 2011-01-01
    “…The catalyst systems Fe/Ni/Al and Co/Zn/Al were synthesized and used in the synthesis of carbon nanotubes. …”
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  9. 189

    Room-Temperature Polyol Synthesis of Ag/SiO2 Nanocomposite as a Catalyst for 4-Nitrophenol Reduction by Canh Minh Thang Nguyen, Vinh Tien Nguyen

    Published 2020-01-01
    “…The highest apparent rate constant was approximately 1.1 ∗ 10−4 s−1, comparable with Ag/SiO2 catalysts prepared using other methods. This study proposes a greener polyol method to synthesize SiO2-supported AgNP catalyst that does not require heating or regulating pH of the reaction mixture. …”
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  10. 190

    Influence of Organoboron Compounds on Ethylene Polymerization Using Cp2ZrCl2/MAO as Catalyst System by Luis Alexandro Valencia López, Francisco Javier Enríquez-Medrano, Ricardo Mendoza Carrizales, Florentino Soriano Corral, Adali Castañeda Facio, Ramón Enrique Díaz de León Gómez

    Published 2014-01-01
    “…Organoboron compounds of nonionic and ionic nature, tris(pentafluorophenyl)borane, and N,N-dimethylanilinium tetra(pentafluorophenyl)borate were evaluated to act in conjunction with MAO as activators on ethylene polymerization by using the catalyst Cp2ZrCl2. A decrease on the catalytic activity was observed in both cases in relation with a reference polyethylene which was synthesized in absence of any organoboron compound. …”
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  11. 191
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    COVID-19 as a Catalyst of Food Security Crisis. Whether the Existing System of Agriculture Can Remain the Same by Oleksandra Ovchynnykova

    Published 2022-12-01
    “…Quarantine that was introduced as a tool to combat the spread of the COVID-19 acted as a catalyst of social, economic, political, ecological, and food crisis that is displayed in the global economic system and in agriculture – its subsystem. …”
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  13. 193

    Porous Zeolitic Imidazolate Framework Loaded Mn as an Efficient Catalyst for the Selective Catalytic Reduction of NOx with NH3 by Yongliang Chen, Meiqing Yu, Rui Wang

    Published 2021-09-01
    “…Moreover, the characterizations of the catalysts including XRD, SEM, EDS, XPS, BET, TGA and H2-TPR were carried out. …”
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  14. 194

    Insights into Reaction Conditions for Selective Catalytic Reduction of NOx with a MnAl Oxide Catalyst at Low Temperatures by Hongjian Zhu, Luming Qiu, Rui Wang

    Published 2021-10-01
    “…Abstract MnOx catalysts have been proven to have superior activity at low temperatures (LT) for selective catalytic reduction (SCR) of NOx. …”
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  17. 197

    Production of C3+ Olefins and Propylene from Ethanol by Zr-Modified H-ZSM-5 Zeolite Catalysts by Megumu Inaba, Kazuhisa Murata, Isao Takahara, Ken-ichiro Inoue

    Published 2012-01-01
    “…In general, catalysts exhibiting the higher initial yield of propylene showed the steeper decrease in propylene yield as the reaction proceeded. …”
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  18. 198

    Effect of Micropore Filling on Chemisorption by Large Surface Area Materials. Adsorption of O and NO by CuZnO Catalysts by Chaim Aharoni, Bice Fubini, Elio Giamello

    Published 1988-12-01
    “…In irreversible chemisorption by large surface area catalysts, the partially covered surface takes up additional amounts of adsorbate only if a given threshold pressure is attained. …”
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  19. 199

    Effects of the Reaction Parameters and Light Hydrothermal Aging for Catalytic Combustion of Propane over Co-Mn-Ce Catalyst by Lili Lei, Miaomiao Jin, Chenrui Cui, Kai Li, Pan Wang

    Published 2022-01-01
    “…A composite oxides’ Co-Mn-Ce catalyst was synthesized by a coprecipitation method, and the experiment was carried out to study the effects of reaction parameters and light hydrothermal aging on propane combustion over the Co-Mn-Ce catalyst. …”
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  20. 200

    Preparation and Characterization of Alkaline and Acidic Heterogeneous Carbon-Based Catalysts and Their Application in Vegetable Oil Transesterification to Obtain Biodiesel by L. L. Díaz-Muñoz, H. E. Reynel-Ávila, D. I. Mendoza-Castillo, A. Bonilla-Petriciolet, J. Jáuregui-Rincón

    Published 2022-01-01
    “…This paper reports the preparation, evaluation, and comparison of alkaline and acidic heterogeneous carbon-based catalysts in the transesterification of safflower oil with methanol to obtain biodiesel. …”
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    Article