CV-etched Nanostructured Ag Foils for Efficient Electrochemical CO2 Reduction

doi:10.1007/s40242-023-3088-z

高等学校化学研究 ›› 2023, Vol. 39 ›› Issue (6): 1031-1036.doi: 10.1007/s40242-023-3088-z

CV-etched Nanostructured Ag Foils for Efficient Electrochemical CO₂ Reduction

MAO Yuanxin¹, CHEN Shi¹, JIA Zihan², DONG Xufeng¹, and MAO Qing²

1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, P.R. China;
2. School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P.R. China

收稿日期:2023-04-06 出版日期:2023-12-01 发布日期:2023-11-18
通讯作者: DONG Xufeng, MAO Qing E-mail:dongxf@dlut.edu.cn;maoqing@dlut.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (No.22179016).

CV-etched Nanostructured Ag Foils for Efficient Electrochemical CO₂ Reduction

MAO Yuanxin¹, CHEN Shi¹, JIA Zihan², DONG Xufeng¹, and MAO Qing²

1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, P.R. China;
2. School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P.R. China

Received:2023-04-06 Online:2023-12-01 Published:2023-11-18
Contact: DONG Xufeng, MAO Qing E-mail:dongxf@dlut.edu.cn;maoqing@dlut.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (No.22179016).

摘要/Abstract

摘要： Electrochemical reduction of CO₂ has attracted wide attention because it can realize an artificial carbon cycle. The key step to achieving efficient electrochemical conversion of CO₂ is the preparation of catalysts with multiple active sites, prepared without additional strong alkaline solutions. In this work, the surfaces of Ag foils were nanosized by simple cyclic voltammetry (CV) pretreatment, which can supply an abundant specific surface area for the CO₂ reduction reaction (CO₂RR). The results indicated that the CO₂RR performance of Ag catalysts was boosted, and the competitive reaction of H₂ evolution was suppressed. For this catalyst, at -0.92 V vs. RHE (reversible hydrogen electrode), the current density of CO achieved 12.31 mA/cm², a significant increase compared to that of the untreated Ag foils (0.81 mA/cm²). The outstanding electrochemical properties are ascribed to the rich nanostructures on Ag foils after the CV pretreatment. The nanostructure has a very high specific surface area, so it can supply more reactive active sites in the process of CO₂RR.

关键词: Electrochemical CO₂ reduction, Ag foil catalyst, Cyclic voltammetry, Nanostructure, High activity

Abstract: Electrochemical reduction of CO₂ has attracted wide attention because it can realize an artificial carbon cycle. The key step to achieving efficient electrochemical conversion of CO₂ is the preparation of catalysts with multiple active sites, prepared without additional strong alkaline solutions. In this work, the surfaces of Ag foils were nanosized by simple cyclic voltammetry (CV) pretreatment, which can supply an abundant specific surface area for the CO₂ reduction reaction (CO₂RR). The results indicated that the CO₂RR performance of Ag catalysts was boosted, and the competitive reaction of H₂ evolution was suppressed. For this catalyst, at -0.92 V vs. RHE (reversible hydrogen electrode), the current density of CO achieved 12.31 mA/cm², a significant increase compared to that of the untreated Ag foils (0.81 mA/cm²). The outstanding electrochemical properties are ascribed to the rich nanostructures on Ag foils after the CV pretreatment. The nanostructure has a very high specific surface area, so it can supply more reactive active sites in the process of CO₂RR.

Key words: Electrochemical CO₂ reduction, Ag foil catalyst, Cyclic voltammetry, Nanostructure, High activity

MAO Yuanxin, CHEN Shi, JIA Zihan, DONG Xufeng, and MAO Qing. CV-etched Nanostructured Ag Foils for Efficient Electrochemical CO₂ Reduction[J]. 高等学校化学研究, 2023, 39(6): 1031-1036.

MAO Yuanxin, CHEN Shi, JIA Zihan, DONG Xufeng, and MAO Qing. CV-etched Nanostructured Ag Foils for Efficient Electrochemical CO₂ Reduction[J]. Chemical Research in Chinese Universities, 2023, 39(6): 1031-1036.

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CV-etched Nanostructured Ag Foils for Efficient Electrochemical CO₂ Reduction

CV-etched Nanostructured Ag Foils for Efficient Electrochemical CO₂ Reduction

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