Effect of the metal−support interaction in Ag/CeO2 catalysts on their activity in ethanol oxidation
- 作者: Grabchenko M.V.1, Mamontov G.V.1, Zaikovskii V.I.2, Vodyankina O.V.1
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隶属关系:
- National Research Tomsk State University
- Boreskov Institute of Catalysis, Siberian Branch
- 期: 卷 58, 编号 5 (2017)
- 页面: 642-648
- 栏目: Article
- URL: https://journals.rcsi.science/0023-1584/article/view/163326
- DOI: https://doi.org/10.1134/S0023158417050056
- ID: 163326
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详细
The interaction of silver with the surface of CeO2 in the Ag/CeO2 catalysts prepared by coprecipitation and impregnation techniques was studied by temperature-programmed reduction, X-ray diffraction, and high-resolution transmission electron microscopy. It was shown that coprecipitation technique led to formation of strong silver–support interaction and the epitaxy of silver particles (d111 = 2.35 Å) on the surface of CeO2 (d111 = 3.1 Å). This provided incresed catalytic activity in the oxidative dehydrogenation of ethanol at relatively low temperatures (a 15% conversion of ethanol with 100% selectivity for the formation of acetaldehyde was reached at 85°C). Above 130°C, the deep oxidation of ethanol to CO2 becomes the predominant direction of a catalytic reaction, and the Ag/CеО2 catalyst obtained by impregnation technique was most active in this region as a consequence of the weaker metal–support interaction.
作者简介
M. Grabchenko
National Research Tomsk State University
编辑信件的主要联系方式.
Email: marygra@mail.ru
俄罗斯联邦, Tomsk, 634050
G. Mamontov
National Research Tomsk State University
Email: marygra@mail.ru
俄罗斯联邦, Tomsk, 634050
V. Zaikovskii
Boreskov Institute of Catalysis, Siberian Branch
Email: marygra@mail.ru
俄罗斯联邦, Novosibirsk, 630090
O. Vodyankina
National Research Tomsk State University
Email: marygra@mail.ru
俄罗斯联邦, Tomsk, 634050
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