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- W4313443613 abstract "High metal dispersion supported catalysts have attracted extensive attention due to their high atom utilization and excellent activities in various catalytic reactions. In this work, Pt/Y2O3-HT was synthesized via a wet-impregnation method modified by hydrothermal process. Compared with Pt/Y2O3 without hydrothermal modification, CO oxidation activity of Pt/Y2O3-HT was significantly improved. The comprehensive experiment results demonstrate that hydrothermal aging at 200 °C could enhance basicity of yttria support by increasing the number of strong basic sites (low coordination surface O2−) and greatly improve dispersion of platinum at atomic level (about 30% and 82% platinum single atom for Pt/Y2O3 and Pt/Y2O3-HT, respectively). Moreover, in-situ DRIFTS results further indicate that hydrothermal treatment could alleviate CO adsorption rate on Pt atoms and clusters to provide more site for the adsorption of oxygen. Our work may provide a new insight for the mechanism of the effect of hydrothermal pretreatment on CO oxidation." @default.
- W4313443613 created "2023-01-06" @default.
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- W4313443613 date "2023-03-01" @default.
- W4313443613 modified "2023-10-14" @default.
- W4313443613 title "Enhancing the low-temperature CO oxidation over Pt/Y2O3 catalyst: The effects of Pt dispersion and support basicity on the catalytic performance" @default.
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- W4313443613 doi "https://doi.org/10.1016/j.apsusc.2022.156210" @default.
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