The Electrophilicity of Surface Carbon Species in the Redox Reactions of CuO-CeO2 Catalysts
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Date
2021-06-21
Publication Type
Journal Article
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Abstract
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-CeO2 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 CO2, carbonate, or carbonyl species in C1 chemistry.
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published
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Volume
60 (26)
Pages / Article No.
14420 - 14428
Publisher
Wiley-VCH
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Subject
CO oxidation; Copper-ceria; electrophilicity; EMSI; surface chemistry
Organisational unit
03510 - Pratsinis, Sotiris E. (emeritus) / Pratsinis, Sotiris E. (emeritus)
09794 - Güntner, Andreas / Güntner, Andreas