催化作用
星团(航天器)
极限(数学)
材料科学
Atom(片上系统)
法拉第效率
纳米技术
原子物理学
物理化学
化学
电化学
物理
电极
计算机科学
数学分析
生物化学
数学
程序设计语言
嵌入式系统
作者
Yawen Jiang,Keke Mao,Jiawei Li,Delong Duan,Jiayi Li,Xinyu Wang,Yuan Zhong,Chao Zhang,Hengjie Liu,Wanbing Gong,Ran Long,Yujie Xiong
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-01-30
卷期号:17 (3): 2620-2628
被引量:9
标识
DOI:10.1021/acsnano.2c10534
摘要
Pushing the performance limit of catalysts is a major goal of CO2 electroreduction toward practical application. A single-atom catalyst is recognized as a solution for achieving this goal, which is, however, a double-edged sword considering the limited loading amount and stability of single-atom sites. To overcome the limit, the loading of single atoms on supports should be well addressed, requiring a suitable model system. Herein, we report the model system of an ultrasmall CeO2 cluster (2.4 nm) with an atomic precise structure and a high surface-to-volume ratio for loading Cu single atoms. The combination of multiple characterizations and theoretical calculations reveals the loading location and limit of Cu single atoms on CeO2 clusters, determining an optimal configuration for CO2 electroreduction. The optimal catalyst achieves a maximum Faradaic efficiency (FE) of 67% and a maximum partial current density of -364 mA/cm2 for CH4, and can maintain high CH4 FE values over 50% in a wide range of applied current densities (-50 ∼ -600 mA/cm2), exceeding those of the reported catalysts.
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