Effect of the metal-support interaction in Ag/CeO2 catalysts on their activity in ethanol oxidation

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Effect of the metal-support interaction in Ag/CeO2 catalysts on their activity in ethanol oxidation	1 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1134/S0023158417050056

Title: Effect of the metal-support interaction in Ag/CeO2 catalysts on their activity in ethanol oxidation
Creator: Grabchenko, M. V.
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Zaikovskii, Vladimir I.
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Vodyankina, Olga V.
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Mamontov, Grigory V.
Date: 2017
DOI: 10.1134/S0023158417050056
Description: 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.

Created: 15-12-2017

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Химический факультет Effect of the metal-support interaction in Ag/CeO2 catalysts on their activity in ethanol oxidation