Abstract
We have synthesized Au/MnO x –CeO2 nanocatalysts for the low-temperature oxidation of carbon monoxide. Gold nanoparticles applied by the deposition precipitation (DP) method were used as an active phase. The composition, structure, and textural characteristics of the materials and the charge state of the components of the catalysts were studied using X-ray diffraction, X-ray photoelectron spectroscopy, highresolution transmission electron microscopy, inductively coupled plasma mass spectrometry, and low-temperature nitrogen adsorption measurements. The carbon monoxide concentration in the catalytic oxidation products was determined by gas chromatography. The influence of calcination temperature on the charge state of the components of the surface layer of Au/ MnOx–CeO2 and the catalytic activity of the materials was examined. The catalytic activity of the materials was shown to be determined to a significant degree by the Mn3+, Au3+, and weakly bound oxygen concentrations in the surface layer.
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Original Russian Text © E.Yu. Liberman, A.V. Naumkin, M.V. Tsodikov, A.I. Mikhailichenko, T.V. Kon’kova, V.N. Grunskii, V.A. Kolesnikov, A.Yu. Pereyaslavtsev, 2017, published in Neorganicheskie Materialy, 2017, Vol. 53, No. 4, pp. 402–409.
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Liberman, E.Y., Naumkin, A.V., Tsodikov, M.V. et al. Synthesis, structure, and properties of a Au/MnO x –CeO2 nanocatalyst for low-temperature oxidation of carbon monoxide. Inorg Mater 53, 406–412 (2017). https://doi.org/10.1134/S0020168517040112
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DOI: https://doi.org/10.1134/S0020168517040112