1. Pt-O-Ce interaction enhanced by Al substitution to promote the acetone degradation through accelerating the breaking of C[sbnd]C bond in acetic acid intermediate.
- Author
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Zhang, Wan-Peng, Li, Ying-Ying, Zhao, Junyi, Wu, Kun, Xiao, Hang, and Li, Jian-Rong
- Subjects
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ACETIC acid , *ACTIVATION energy , *ACETONE , *VOLATILE organic compounds , *CERIUM oxides , *CHARGE exchange - Abstract
[Display omitted] The reaction rate of volatile organic compounds (VOCs) oxidation is controlled by the rate-limiting step in the total reaction process. This study proposes a novel strategy, by which the rate-limiting step of acetone oxidation is accelerated by enhanced chemical bond interaction with more electrons transfer through Al-substituted CeO 2 loaded Pt (Pt/Al-CeO 2). Results indicate that the rate-limiting step in the process of acetone oxidation is the decomposition of acetic acid. Al substitution enhances the Pt-O-Ce interaction that transfers more electrons from Pt/Al-CeO 2 to acetic acid, promoting the breaking of its C C bond with a lower free energy barrier. Attributing to these, the reaction rate of Pt/Al-CeO 2 is 13 times as high as that of Pt/CeO 2 and its TOF Pt value is 11 times as high as that of Pt/CeO 2 at 150 °C. Moreover, the CO 2 selectivity of Pt/Al-CeO 2 also increases by 22 %. This work establishes the relationship between Pt-O-Ce interaction and acetone oxidation that provides novel perspectives on the development of efficient materials for VOCs oxidation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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