SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (10): 2549-2554.DOI: 10.1016/j.cjche.2020.04.015

• Catalysis, Kinetics and Reaction Engineering • Previous Articles     Next Articles

An experimental study of electroreduction of CO2 to HCOOH on SnO2/C in presence of alkali metal cations (Li+, Na+, K+, Rb+ and Cs+) and anions (HCO3-, Cl-, Br- and I-)

Qi Zhang, Xiaolin Shao, Jin Yi, Yuyu Liu, Jiujun Zhang   

  1. Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, China
  • Received:2019-12-29 Revised:2020-04-13 Online:2020-12-03 Published:2020-10-28
  • Contact: Yuyu Liu
  • Supported by:
    This work was financially supported by International Academic Cooperation and Exchange Program of Shanghai Science and Technology Committee (18160723600) and Scientific Research and Technology Development Plan of Guangxi (GUIKE AD17195084).

An experimental study of electroreduction of CO2 to HCOOH on SnO2/C in presence of alkali metal cations (Li+, Na+, K+, Rb+ and Cs+) and anions (HCO3-, Cl-, Br- and I-)

Qi Zhang, Xiaolin Shao, Jin Yi, Yuyu Liu, Jiujun Zhang   

  1. Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, China
  • 通讯作者: Yuyu Liu
  • 基金资助:
    This work was financially supported by International Academic Cooperation and Exchange Program of Shanghai Science and Technology Committee (18160723600) and Scientific Research and Technology Development Plan of Guangxi (GUIKE AD17195084).

Abstract: It is well-known that the electrolytes can influence the electrochemical reduction of carbon dioxide (ERCO2) in aqueous media. In this work, we explore the effects of alkali metal cations and anions (Li+, Na+, K+, Rb+, Cs+, HCO3-, Cl-, Br-, I-) on the current density and product selectivity for the ERCO2 into formic acid (HCOOH) on the SnO2/carbon paper (SnO2/C) electrode. Results of the ERCO2 experiments show that for the cations, the promotion effects on current density and faradaic efficiencies (FEs) are in the order of Li+ < Na+ < K+ < Cs+ < Rb+. For the anions, the current density values are in the order of NaHCO3 < NaCl < NaBr < NaI and KHCO3 < KCl ≈ KI < KBr, respectively, and that on the FEs for the formation of the HCOOH (FEHCOOH) is HCO3- < Cl- < Br- < I-. Based on this result, the effects of alkali metal cations and anions on ERCO2 are discussed.

Key words: Carbon dioxide, Electroreduction, SnO2 electrode, Effects, Anions, Cations

摘要: It is well-known that the electrolytes can influence the electrochemical reduction of carbon dioxide (ERCO2) in aqueous media. In this work, we explore the effects of alkali metal cations and anions (Li+, Na+, K+, Rb+, Cs+, HCO3-, Cl-, Br-, I-) on the current density and product selectivity for the ERCO2 into formic acid (HCOOH) on the SnO2/carbon paper (SnO2/C) electrode. Results of the ERCO2 experiments show that for the cations, the promotion effects on current density and faradaic efficiencies (FEs) are in the order of Li+ < Na+ < K+ < Cs+ < Rb+. For the anions, the current density values are in the order of NaHCO3 < NaCl < NaBr < NaI and KHCO3 < KCl ≈ KI < KBr, respectively, and that on the FEs for the formation of the HCOOH (FEHCOOH) is HCO3- < Cl- < Br- < I-. Based on this result, the effects of alkali metal cations and anions on ERCO2 are discussed.

关键词: Carbon dioxide, Electroreduction, SnO2 electrode, Effects, Anions, Cations