格式化
电化学
甲酸
法拉第效率
催化作用
原位
离子
电极
材料科学
离子交换
无机化学
协同催化
化学工程
化学
物理化学
有机化学
工程类
作者
Shulin Zhao,Yuwen Qin,Xuerong Wang,Wu Chun,Xin Chen,Yu Wang,Jie-Xiang Yu,Xiaojing Liu,Yuping Wu,Yuhui Chen
出处
期刊:Small
[Wiley]
日期:2023-06-27
卷期号:19 (43)
被引量:6
标识
DOI:10.1002/smll.202302878
摘要
Electrochemical reduction of CO2 (CO2 RR) into value-added products is a promising strategy to reduce energy consumption and solve environmental issues. Formic acid/formate is one of the high-value, easy-to-collect, and economically viable products. Herein, the reconstructed Bi2 O2 CO3 nanosheets (BOCR NSs) are synthesized by an in situ electrochemical anion exchange strategy from Bi2 O2 SO4 as a pre-catalyst. The BOCR NSs achieve a high formate Faradaic efficiency (FEformate ) of 95.7% at -1.1 V versus reversible hydrogen electrode (vs. RHE), and maintain FEformate above 90% in a wide potential range from -0.8 to -1.5 V in H-cell. The in situ spectroscopic studies reveal that the obtained BOCR NSs undergo the anion exchange from Bi2 O2 SO4 to Bi2 O2 CO3 and further promote the self-reduction to metallic Bi to construct Bi/BiO active site to facilitate the formation of OCHO* intermediate. This result demonstrates anion exchange strategy can be used to rational design high performance of the catalysts toward CO2 RR.
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