期刊
ADVANCED SUSTAINABLE SYSTEMS
卷 5, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsu.202100256
关键词
CO2 reduction; nanowire clusters; noble metals; plasma engineering
资金
- National Natural Science Foundation of China [51902138]
- Natural Science Foundation of Jiangsu Province [BK20190835]
- China Postdoctoral Science Foundation [2019M661740]
- Project and Startup Foundation for Advanced Talents of Jiangsu university [19JDG016]
- Innovation and Entrepreneurship Plan of Jiangsu Province
- Jiangsu University, Jiangsu Fund for Distinguished Young Scientists [BK20190045]
- High-Tech Research Key Laboratory of Zhenjiang [SS2018002]
- Priority Academic Program Development of Jiangsu Higher Education Institutions [KYCX20_3041]
- Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province [KFKT2019002]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- High Performance Computing Platform of Jiangsu University
The nonmetallic activation of metal electrodes is an effective and universal method for improving the catalytic activity of the CO2 reduction reaction. In this study, selective electrocatalytic reduction of CO2 was conducted on a plasma-activated Ag/Ag2S catalyst for the first time. The high Faradaic efficiency for CO generation on Ag/Ag2S is attributed to enhanced CO2 activation and reduced reaction energy barrier of the limiting step, as revealed by density functional theory studies.
Nonmetallic activation of metal electrodes is effective and universal to improve the catalytic activity for the CO2 reduction reaction. Here, selective electrocatalytic reduction of CO2 is performed on a plasma-activated Ag/Ag2S catalyst for the first time. By a facile H2S plasma treatment on Ag foil and subsequent electrochemical prereduction, Ag/Ag2S nanowire clusters are obtained in situ with different sizes. High Faradaic efficiency for CO generation on Ag/Ag2S is shifted to a significantly lower overpotential compared with untreated Ag foil with high current density. Density functional theory studies reveal that the promoted catalytic activity can be ascribed to the enhanced CO2 activation and reduced reaction energy barrier of the limiting step.
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