不同电解液离子对CO_2电还原的影响  

Research on affect for electrochemical reduction of CO_2 by different ions

作　　者：张琪[1] 李军[1] 

机构地区：[1]中国船舶重工集团公司第七一八研究所,河北邯郸056027

出　　处：《舰船科学技术》2010年第12期60-64,共5页Ship Science and Technology

摘　　要：研究了纯水、KHCO3溶液、Li2CO3溶液、K2SO4溶液、K2CO3溶液及不同浓度KHCO3溶液做电解液时对CO2电还原的影响,初步探讨了电解液中存在不同离子时CO2电还原的反应机理。试验结果表明,CO2还原效果为:纯水<饱和Li2CO3溶液<K2SO4溶液<K2CO3溶液<KHCO3溶液,且随KHCO3溶液浓度的增大呈现出抛物线趋势。最适合的电解液为0.2 mol/L的KHCO3溶液。The effect of CO2 electrochemical reduction by different electrolyte,such as pure water,Li2CO3 solution,K2SO4 solution,K2CO3 solution and KHCO3 solution with different concentration were studied in this paper,and the reaction mechanism was considered preliminarily.The experiments showed that reducing sequence is：pure water〈Li2CO3 solution〈K2SO4 solution〈K2CO3 solutionKHCO3 solution,and reducing effects is parabolic tendency with the increase of concentration of KHCO3 solution.The optimum electrolyte for CO2 electrochemical reduction is 0.2 mol/L KHCO3 solution.

关 键 词：电还原 电解液 KHCO3溶液 Li2CO3溶液 

分 类 号：TQ116.21[化学工程—无机化工]