吸附
拉曼光谱
选择性
法拉第效率
原电池
催化作用
化学
化学工程
电化学
材料科学
分析化学(期刊)
无机化学
物理化学
冶金
电极
有机化学
工程类
物理
光学
作者
Jinlong Yin,Zeyu Gao,Fengyuan Wei,Chang Liu,Jun Gong,Jinmeng Li,Wenzheng Li,Li Xiao,Gongwei Wang,Juntao Lu
标识
DOI:10.1021/acscatal.1c04714
摘要
Cu-catalyzed CO2 electroreduction can produce various hydrocarbons and oxygenates. However, it suffers from low activity and poor selectivity. Herein, Cu-decorated CeO2 composites (Cuy/CeO2) with distinct interfacial characteristics were fabricated through a highly controllable synthesis, based on chemical prelithiation of CeO2 and then galvanic displacement with Cu. The Cu decoration induced a strong-binding site for CO2 adsorption at the Cu and CeO2 interface, facilitating the CO2 activation and conversion to the *CO intermediate on the nearby Cu surface. Selective CO2 conversion to C1 or C2+ products was customized by adjusting the Cu decoration amount. With the increase in the Cu loading, the C1 and C2+ products exhibited a declining and volcano-shaped trend, showing a maximum faradaic efficiency of 70 and 63%, respectively. In situ infrared and Raman spectroscopy revealed that the reduction pathway depended on the relative ratio of the low-frequency band *COLFB to the high-frequency band *COHFB. Our findings may contribute to the rational design of heterostructured catalysts toward CO2 electroreduction.
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