Abstract
Nanocomposite catalysts based on highly dispersed platinum and ceria particles supported on carbon nanotubes were studied. The composites were prepared using the complex (Мe4N)2[Pt2(μ-OH)2(NO3)8] as the platinum precursor. This approach ensured stabilization of platinum nanoparticles, clusters, and single atoms/ions on the surface of both ceria and the carbon nanomaterial. Study of the catalytic activity of the samples showed that highly dispersed metallic platinum species stabilized directly on the surface of carbon nanotubes can efficiently oxidize CO present in low concentrations in a reaction mixture at room temperature, in particular, in the presence of water vapor. However, low-temperature CO oxidation at higher CO concentrations requires formation of new active sites through interaction of platinum ions with ceria particles.
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ACKNOWLEDGMENTS
TEM examination was carried out using equipment of the Center for Collective Use “ National Catalyst Research Center” (Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences).
Funding
This study was supported by the Russian Science Foundation, project No. 21-13-00094 dated April 20, 2021.
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Translated by Z. Svitanko
The paper was submitted to the special issue “Heterogeneous Catalysis and Environmental Protection.”
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Kibis, L.S., Korobova, A.N., Zadesenets, A.V. et al. Catalysts for Low-Temperature CO Oxidation Based on Platinum, CeO2, and Carbon Nanotubes. Dokl Phys Chem 505, 115–121 (2022). https://doi.org/10.1134/S0012501622700038
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DOI: https://doi.org/10.1134/S0012501622700038