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The Electrophilicity of Surface Carbon Species in the Redox Reactions of CuO‐CeO 2 Catalysts
Author(s) -
Kang Liqun,
Wang Bolun,
Güntner Andreas T.,
Xu Siyuan,
Wan Xuhao,
Liu Yiyun,
Marlow Sushila,
Ren Yifei,
Gianolio Diego,
Tang Chiu C.,
Murzin Vadim,
Asakura Hiroyuki,
He Qian,
Guan Shaoliang,
VelascoVélez Juan J.,
Pratsinis Sotiris E.,
Guo Yuzheng,
Wang Feng Ryan
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202102570
Subject(s) - redox , chemistry , catalysis , metal , carbon fibers , absorption spectroscopy , inorganic chemistry , oxide , x ray absorption spectroscopy , diffuse reflectance infrared fourier transform , spectroscopy , photochemistry , absorption (acoustics) , materials science , photocatalysis , organic chemistry , physics , quantum mechanics , composite number , composite material
Electronic metal–support interactions (EMSI) describe the electron flow between metal sites and a metal oxide support. It is generally used to follow the mechanism of redox reactions. In this study of CuO‐CeO 2 redox, an additional flow of electrons from metallic Cu to surface carbon species is observed via a combination of operando X‐ray absorption spectroscopy, synchrotron X‐ray powder diffraction, near ambient pressure near edge X‐ray absorption fine structure spectroscopy, and diffuse reflectance infrared Fourier transform spectroscopy. An electronic metal–support–carbon interaction (EMSCI) is proposed to explain the reaction pathway of CO oxidation. The EMSCI provides a complete picture of the mass and electron flow, which will help predict and improve the catalytic performance in the selective activation of CO 2 , carbonate, or carbonyl species in C1 chemistry.