Highly efficient In-Sn alloy catalysts for electrochemical reduction of CO2 to formate

作者：Lai, Qiang; Yang, Na; Yuan, Gaoqing^*

来源：Electrochemistry Communications, 2017, 83: 24-27.

DOI：10.1016/j.elecom.2017.08.015

• Electrochemical reduction of CO2
• Indium-tin alloy
• Formate
• Bimetallic catalysts

Gas diffusion electrodes (GDEs), including GDE-In0.90Sn0.10, GDE-In0.47Sn0.53 and GDE-In0.22Sn0.78, were prepared by electrodeposition of In-Sn alloys on carbon fiber paper, and then used to explore the electroreduction of CO2 to formate in aqueous solution. Compared with commercial indium or Sn foil catalysts, the GDEIn(0.90)Sn(0.10) electrode in particular is shown to have excellent catalytic performance towards electroreduction of CO2 to formate, with a high Faradaic efficiency (similar to 92%). More importantly, the catalytic activity of GDEIn(0.90)Sn(0.10) remained reasonably stable over a 22-hour period of electrolysis, and a relatively high electrolytic current density (15 mA cm(-2)) was obtained in an aqueous medium, demonstrating its potential for electrochemical reduction of CO2 to formate.

• 出版日期2017-10
• 单位华南理工大学