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Effect of the microstructure of the supported catalysts CuO/TiO2 and CuO/(CeO2-TiO2) on their catalytic properties in carbon monoxide oxidation

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Abstract

The effect of the microstructure of titanium dioxide on the structure, thermal stability, and catalytic properties of supported CuO/TiO2 and CuO/(CeO2-TiO2) catalysts in CO oxidation was studied. The formation of a nanocrystalline structure was found in the CuO/TiO2 catalysts calcined at 500°C. This nanocrystalline structure consisted of aggregated fine anatase particles about 10 nm in size and interblock boundaries between them, in which Cu2+ ions were stabilized. Heat treatment of this catalyst at 700°C led to a change in its microstructure with the formation of fine CuO particles 2.5–3 nm in size, which were strongly bound to the surface of TiO2 (anatase) with a regular well-ordered crystal structure. In the CuO/(CeO2-TiO2) catalysts, the nanocrystalline structure of anatase was thermally more stable than in the CuO/TiO2 catalyst, and it persisted up to 700°C. The study of the catalytic properties of the resulting catalysts showed that the CuO/(CeO2-TiO2) catalysts with the nanocrystalline structure of anatase were characterized by the high-est activity in CO oxidation to CO2.

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Authors and Affiliations

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

    A. A. Shutilov, G. A. Zenkovets, S. V. Tsybulya, V. Yu. Gavrilov & G. N. Kryukova

  2. Novosibirsk State University, Novosibirsk, 630090, Russia

    A. A. Shutilov, G. A. Zenkovets & S. V. Tsybulya

Authors
  1. A. A. Shutilov
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  2. G. A. Zenkovets
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  3. S. V. Tsybulya
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  4. V. Yu. Gavrilov
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  5. G. N. Kryukova
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Correspondence to A. A. Shutilov.

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Original Russian Text © A.A. Shutilov, G.A. Zenkovets, S.V. Tsybulya, V.Yu. Gavrilov, G.N. Kryukova, 2012, published in Kinetika i Kataliz, 2012, Vol. 53, No. 3, pp. 424–434.

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Shutilov, A.A., Zenkovets, G.A., Tsybulya, S.V. et al. Effect of the microstructure of the supported catalysts CuO/TiO2 and CuO/(CeO2-TiO2) on their catalytic properties in carbon monoxide oxidation. Kinet Catal 53, 409–418 (2012). https://doi.org/10.1134/S0023158412030111

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  • DOI: https://doi.org/10.1134/S0023158412030111

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