期刊
JOURNAL OF CATALYSIS
卷 413, 期 -, 页码 703-712出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2022.07.024
关键词
Heterogeneous catalysis; Water-gas shift reaction; Photo-deposition; Dechlorination; Surface oxygen activation
资金
- National Key Basic Research Program of China [2021YFA1501103]
- National Science Foundation of China [22075166]
- Taishan Scholar Project of Shandong Province of China
- China Postdoctoral Science Foundation [2021M691753]
- Young Scholars Program of Shandong University
This study reports a photochemical strategy for the fabrication of promoted Pt-CeO2 catalysts through UV-induced deep dechlorination and surface oxygen activation. The strategy shows universality for catalyst synthesis with different metals, supports, and reactions, providing a new approach for the synthesis of robust catalysts.
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. (C) 2022 Published by Elsevier Inc.
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