The Electrophilicity of Surface Carbon Species in the Redox Reactions of CuO-CeO 2 Catalysts
The Electrophilicity of Surface Carbon Species in the Redox Reactions of CuO-CeO 2 Catalysts
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CuO-CeO 2 催化剂氧化还原反应中表面碳物种的亲电性
DOI：
10.1002/ange.202102570
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发表时间：
2021
影响因子：
--
通讯作者：
Kang L
中科院分区：
文献类型：
--
作者：
Kang L
电子金属-载体相互作用（EMSI）描述了金属位点和金属氧化物载体之间的电子流动。它通常用于跟踪氧化还原反应的机理。在CuO-CeO 2氧化还原的这项研究中，通过操作X射线吸收光谱、同步加速器X射线粉末衍射、近环境压力近边X射线吸收精细结构光谱和漫反射红外傅里叶变换光谱的组合，观察到从金属Cu到表面碳物种的额外电子流。提出了一种电子金属-载体-碳相互作用（EMSCI）来解释CO氧化反应途径。EMSCI提供了一个完整的图片的质量和电子流，这将有助于预测和提高在C1化学中的CO2，碳酸盐或羰基物种的选择性活化的催化性能。
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‐CeO2redox, 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.