催化作用
化学
贵金属
离解(化学)
惰性
金属
氧气
光化学
多相催化
无机化学
化学工程
有机化学
工程类
作者
Han Yan,Xuetao Qin,Jincheng Liu,Li‐Hua Cai,Peng Xu,Jianjun Song,Chao Ma,Weiwei Wang,Jianwei Zhao,Chun‐Jiang Jia
标识
DOI:10.1016/j.jcat.2022.07.024
摘要
During regular synthesis, the supported catalysts may suffer from incomplete exposure of metal sites, whose activity may accordingly be limited by the stubborn residues and inert coordination environment. Here we report a photochemical strategy to fabricate promoted Pt-CeO2 catalysts, where UV-induced deep dechlorination and the following surface oxygen activation are achieved. With a photo-deposition method, the usually neglected stubborn Cl residues are easily removed from Pt-CeO2. The adjacent oxygen species are activated under UV illumination, whose flexible elimination creates sufficient surface vacancies, resulting in enhanced H2O dissociation. The derived catalyst shows excellent performances for the water–gas shift (WGS) reaction. Such strategy shows universality toward different metals, supports and reactions. This work sheds light on the synthesis of robust catalysts, by applying photochemical method for Cl removal and surface oxygen activation. The universal strategy shows great potentials in developing promoted solid catalysts for various heterogeneous reactions.
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