催化作用
氧还原反应
氧还原
电催化剂
氧气
还原(数学)
化学
无机化学
材料科学
化学工程
电化学
电极
物理化学
有机化学
几何学
数学
工程类
作者
Quanquan Bie,Haibo Yin,Yunlong Wang,Haiwei Su,Yue Peng,Junhua Li
出处
期刊:Chinese Journal of Catalysis
[China Science Publishing & Media Ltd.]
日期:2024-02-01
卷期号:57: 96-104
被引量:1
标识
DOI:10.1016/s1872-2067(23)64587-5
摘要
Electrochemical conversion of CO2 to high energy density multi-carbon liquid phase fuels such as ethanol offers a promising strategy to realize carbon neutrality. However, the selectivity of value-added C2 liquid products is still deemed unsatisfactory currently due to the high overpotential, poor selectivity, and the difficulty of the C–C coupling process. Herein, we report that Cu single atoms (SAs) on hydrogen reduced UIO66-NH2 (named Cu SAs/UIO-H2) achieve C2 liquid products Faraday efficiency (FE) of 58.62% and ethanol FE of 46.28% at a low potential of –0.66 V versus the reversible hydrogen electrode. The ethanol FE of Cu SAs/UIO-H2 is 9.61 times higher than UIO66-NH2. Moreover, the experimental results and theoretical calculations demonstrate that Cu SAs and oxygen vacancies (OVs) synergistically promote the generation of *HCCOH intermediate, thus accelerating the formation of ethanol. This work offers deeper understanding at the atomic scale for designing high-performance electrocatalysts for CO2 conversion to valuable liquid fuels.
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