催化作用
猝灭(荧光)
吸附
金属
再分配(选举)
化学
化学工程
电子转移
氧气
材料科学
无机化学
光化学
物理化学
有机化学
荧光
物理
量子力学
政治
政治学
法学
工程类
作者
Shuaiqi Zhao,Jianwen Lin,Wen-Qiang Gong,Aihua Xu,Xiaoxia Li,Yongcai Qiu
标识
DOI:10.1016/j.seppur.2023.125864
摘要
Pt-based catalysts are one of the most extensively used heterogeneous catalysts for the degradation of pollutants, and regulating electron-metal-support interaction (EMSI) is an efficient strategy to enhance the performance of Pt-based catalysts. Herein, we introduced a quenching technique for regulating the EMSI of Pt-CuO/CeO2 catalysts to significantly boost its CO catalytic activity. The EMSI optimized by quenching was determined to promote the electron redistribution between Pt and CuO/CeO2 via Cu–O-Pt structure, thus forming more electron-rich Pt species and enhancing the surface oxygen species activity. From comprehensive characterization investigations, we confirmed that the superior activity arouse from the moderate Pt0/Pt2+ ratio, in which CO molecules were preferentially adsorbed on the electron-rich Pt sites and reacted with active oxygen species from PtOx or CuO/CeO2, accelerating the whole CO catalytic process. Our finding provided a new inspiration to control EMSI of Pt-based catalysts and widened the application of quenching chemistry in heterogeneous catalysis.
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