Abstract
The effect of iron oxide additives on the formation of the microstructure of supported 1 wt % Pt/(Fe2O3–TiO2) catalysts, the electronic state of platinum, and the catalytic properties of the catalysts in the CO oxidation reaction has been studied. The synthesized catalyst has exhibited a higher activity than that of a 1 wt % Pt/TiO2 catalyst at identical amounts of platinum in the samples. It has been found that the introduction of iron oxide in an amount of up to 10 wt % leads to the formation of a solid solution of iron ions in titania with an anatase structure. The supporting of platinum has led to a decrease in the particle size and an increase in the content of platinum in the Ptδ+ state. An optimum chemical composition of the catalyst that provides the highest activity in the studied reaction has been determined.
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ACKNOWLEDGMENTS
The authors thank S.A. Petrov for studying the catalysts by the Mössbauer spectroscopy method, I.P. Prosvirin for studying the catalysts by the XPS method, and I.Yu. Pakharukov for testing the catalytic activity.
Funding
This work was supported by the Ministry of Science and Higher Education of the Russian Federation under a state order to Boreskov Institute of Catalysis of the Siberian Branch of the Russian Academy of Sciences (project AAAA-A21-121011390054-1).
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Translated by M. Timoshinina
Abbreviations and notation: CO-PROX, preferential oxidation of carbon monoxide; EXAFS, extended X-ray absorption fine structure spectroscopy; Dcsr, coherent scattering region; HR-TEM, high-resolution transmission electron microscopy; BET, Brunauer–Emmett–Teller method; XPS, X-ray photoelectron spectroscopy; Ssp, specific surface area; Eb, electron binding energy
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Shutilov, A.A., Zenkovets, G.A. Synergetic Effect of an Iron Oxide Additive to the Composition of a Support for a Pt/TiO2 Catalyst in the Carbon Monoxide Oxidation Reaction. Kinet Catal 62, 621–631 (2021). https://doi.org/10.1134/S0023158421050104
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DOI: https://doi.org/10.1134/S0023158421050104