选择性
催化作用
法拉第效率
材料科学
化学工程
dBc公司
电化学
无机化学
多孔性
化学
金属
电极
物理化学
冶金
光电子学
有机化学
复合材料
工程类
CMOS芯片
作者
Yu Zhang,Long‐Zhang Dong,Shan Li,Xin Huang,Jia‐Nan Chang,Jianhui Wang,Jie Zhou,Shun-Li Li,Ya‐Qian Lan
标识
DOI:10.1038/s41467-021-26724-8
摘要
The electrochemical CO2 reduction to high-value-added chemicals is one of the most promising and challenging research in the energy conversion field. An efficient ECR catalyst based on a Cu-based conductive metal-organic framework (Cu-DBC) is dedicated to producing CH4 with superior activity and selectivity, showing a Faradaic efficiency of CH4 as high as ~80% and a large current density of -203 mA cm-2 at -0.9 V vs. RHE. The further investigation based on theoretical calculations and experimental results indicates the Cu-DBC with oxygen-coordinated Cu sites exhibits higher selectivity and activity over the other two crystalline ECR catalysts with nitrogen-coordinated Cu sites due to the lower energy barriers of Cu-O4 sites during ECR process. This work unravels the strong dependence of ECR selectivity on the Cu site coordination environment in crystalline porous catalysts, and provides a platform for constructing highly selective ECR catalysts.
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