摘要
在1-丁基3-甲基咪唑三氟甲基磺酸盐([Bmim][CF3SO3])/碳酸丙烯酯(PC)溶液中,研究了CO2在金电极上的电还原反应,分析了水对有机电解液导电率、黏度和阴极反应动力学过程的影响。结果表明:当含水量(质量分数)较低时,水的存在有利于CO的生成,为2%时,生成CO的电流效率达到最高值96.5%。当含水量进一步增加时,生成CO的电流效率降低,生成H2的电流效率升高。CO2电还原气相产物可用于替代天然气生产甲醇,阴极电解液的最佳含水量为0—10%。
The CO2 electrochemical reduction on gold electrode was studied in 1-butyl-3-methylimidazolium trifluoromethanesulfonate （ [ BMIM ] [ CF3 SO3 ] ） / propylene carbonate （PC） solution, and the effect of water on the conductivity, viscosity of the catholyte and the cathode reaction kinetics process was analyzed. The results show that a small amount of water contained in the catholyte has active effect on the electrochemical reduction of CO2 to CO. The highest CO faradic efficiency reaches 96.5% when the water mass fraction is 2% in the catholyte. With the increase of water in the catholyte, the CO faradic efficiency reduces, while the faradic efficiency of H2 increases consequently. The mixture gases generated from the CO2 electroreduetion reaction can be used as the alternatives for methanol synthesis. For this aim, the optimum moisture mass fraction in the catholyte is 0-10%.
出处
《化学工程》
CAS
CSCD
北大核心
2015年第9期1-5,共5页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(51164020)
关键词
二氧化碳
电化学还原
气相色谱
合成气
甲醇
carbon dioxide
electrochemical reduction
gas chromatography
synthesis gas
methanol
