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^-)  

作　　者：Qi Zhang Xiaolin Shao Jin Yi Yuyu Liu Jiujun Zhang 

机构地区：[1]Institute for Sustainable Energy,College of Sciences,Shanghai University,Shanghai 200444,China

出　　处：《Chinese Journal of Chemical Engineering》2020年第10期2549-2554,共6页中国化学工程学报（英文版）

基　　金：financially supported by International Academic Cooperation and Exchange Program of Shanghai Science and Technology Committee(18160723600);Scientific Research and Technology Development Plan of Guangxi(GUIKE AD17195084)。

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(Sn O2/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^+b Na^+b K^+b Cs^+b Rb^+.For the anions,the current density values are in the order of Na HCO3 b NaClb Na Br b Na I and KHCO3 b KCl≈KI b KBr,respectively,and that on the FEs for the formation of the HCOOH(FEHCOOH)is HCO3-b Cl-b Br-b 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 

分 类 号：TQ225.121[化学工程—有机化工] X701[环境科学与工程—环境工程]