Formate-Selective CO2 Electrochemical Reduction with a Hydrogen-Reduction-Suppressing Bronze Alloy Hollow-Fiber Electrode

作者：Chen, Biyu; Xu, Jiajie; Zou, Jiantao; Liu, Defei^*; Situ, Yue^*; Huang, Hong^*

来源：ChemSusChem, 2020, 13(24): 6594-6601.

DOI：10.1002/cssc.202002314

• bronze alloy hollow fiber
• CO2 reduction
• electrocatalysis
• formate selectivity
• HER suppressing

Electroreduction carbon dioxide into formate has been regarded as a hopeful measure to relieve global warming. Copper-based hollow fibers demonstrated good performances on converting carbon dioxide in previous researches. Herein Cu-Sn alloy hollow fibers were synthesized in an innovative way, combining the structure advantages of hollow fiber and high selectivity towards formate on eta ' bronze. Tests under different gas injection conditions were conducted to analyze the contribution of the hollow fiber structure on suppression of hydrogen evolution and promotion on kinetics. Strikingly, Cu-Sn-45 % hollow fiber, the optimal catalyst in this work, achieved a highest faradaic efficiency towards formate of 90.96 % at a lower potential of -0.75 V vs. RHE than most non-noble catalysts, and the FE of H-2 was below 4 %.

• 单位
  佛山科学技术学院; y