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Synthesis and catalytic properties of nanostructured Me/Mn0.5Ce0.5O2 in the oxidation of carbon monoxide

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Abstract

The nanostructured solid solution Mn0.5Ce0.5O2 is synthesized to develop effective noble metal free catalysts for the detoxification of technogenic contaminants. Its chemical and phase compositions and textural characteristics are studied by differential thermal analysis, X-ray diffraction analysis, laser mass spectrometry, and low-temperature nitrogen adsorption. The activity of the solid solution in the oxidation of carbon monoxide is determined by the flow method within a temperature range of 20–300°C at atmospheric pressure, a gas hourly space velocity of 1800 h−1 for the following gas mixture composition, vol %: CO, 3.6; O2, 8.0; N2, balance. The activity of Mn0.5Ce0.5O2 is shown to be appreciably higher than the activity of MnOx and CeO2, and the temperature of 100% conversion is 92, 120, and 210°C, respectively. Using the solid solution as a support and the technique of impregnation, we synthesize the nanostructured catalysts Cu/Mn0.5Ce0.5O2 and Ag/Mn0.5Ce0.5O2, which manifest high activity in the oxidation of carbon monoxide: the temperature of 100% conversion is 77 and 85°C, respectively. The new catalysts could be of interest for the purification of industrial and motor vehicle wastes.

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Authors and Affiliations

  1. Mendeleev University of Chemical Technology, Moscow, 125047, Russia

    E. Yu. Liberman, B. S. Kleusov, A. I. Mikhailichenko, T. V. Kon’kova & A. V. Khoroshilov

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  1. E. Yu. Liberman
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  2. B. S. Kleusov
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  3. A. I. Mikhailichenko
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  4. T. V. Kon’kova
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  5. A. V. Khoroshilov
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Original Russian Text © E.Yu. Liberman, B.S. Kleusov, A.I. Mikhailichenko, T.V. Kon’kova, A.V. Khoroshilov, 2012, published in Kataliz v Promyshlennosti.

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Liberman, E.Y., Kleusov, B.S., Mikhailichenko, A.I. et al. Synthesis and catalytic properties of nanostructured Me/Mn0.5Ce0.5O2 in the oxidation of carbon monoxide. Catal. Ind. 4, 186–190 (2012). https://doi.org/10.1134/S2070050412030075

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  • DOI: https://doi.org/10.1134/S2070050412030075

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