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The electrophilicity of surface carbon species in the redox of CuO‐CeO2 catalysts

DOI: 10.1002/anie.202102570 DOI Help

Authors: Liqun Kang (University College London) , Bolun Wang (University College London) , Andreas T. Güntner (ETH Zurich) , Siyuan Xu (Wuhan University) , Xuhao Wan (Wuhan University) , Yiyun Liu (University College London) , Sushila Marlow (University College London) , Yifei Ren (University College London) , Diego Gianolio (Diamond Light Source) , Chiu C. Tang (Diamond Light Source) , Vadim Murzin (DESY: Deutsches Elektronen-Synchrotron) , Hiroyuki Asakura (Kyoto University) , Qian He (National University of Singapore) , Shaoliang Guan (Cardiff University) , Juan J. Velasco-Vélez (Fritz-Haber-Institut der MPG Berlin) , Sotiris E. Pratsinis (ETH Zurich) , Yuzheng Guo (Wuhan University) , Feng Ryan Wang (University College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Angewandte Chemie International Edition

State: Published (Approved)
Published: March 2021

Open Access Open Access

Abstract: Electronic metal‐support interaction (EMSI) describes the electron flow between metal sites and a metal oxide support. It is generally used to follow the mechanism of redox reactions. In the study of CuO‐CeO2 redox, an additional flow of electron 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, 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 CO2 , carbonate or carbonyl species in C1 chemistry.

Journal Keywords: CO oxidation; copper-ceria; EMSI; surface carbon; electrophilicity

Subject Areas: Chemistry

Facility: BESSY II; SPring-8; DESY

Documents:
anie.202102570.pdf

Discipline Tags:

Catalysis Physical Chemistry Chemistry

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