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

Kinetics and Catalysis volume 58, pages 642–648 (2017)Cite this article

Abstract

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 (d 111 = 2.35 Å) on the surface of CeO2 (d 111 = 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.

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Authors and Affiliations

  1. National Research Tomsk State University, Tomsk, 634050, Russia

    M. V. Grabchenko, G. V. Mamontov & O. V. Vodyankina

  2. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    V. I. Zaikovskii

Authors
  1. M. V. Grabchenko
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  2. G. V. Mamontov
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  3. V. I. Zaikovskii
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  4. O. V. Vodyankina
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Corresponding author

Correspondence to M. V. Grabchenko.

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Original Russian Text © M.V. Grabchenko, G.V. Mamontov, V.I. Zaikovskii, O.V. Vodyankina, 2017, published in Kinetika i Kataliz, 2017, Vol. 58, No. 5, pp. 654–661.

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Grabchenko, M.V., Mamontov, G.V., Zaikovskii, V.I. et al. Effect of the metal−support interaction in Ag/CeO2 catalysts on their activity in ethanol oxidation. Kinet Catal 58, 642–648 (2017). https://doi.org/10.1134/S0023158417050056

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  • DOI: https://doi.org/10.1134/S0023158417050056

Keywords

  • Ag/CeO2 catalysts
  • metal−support interaction
  • ethanol oxidation