A novel electrolysis cell for CO₂ reduction to CO in ionic liquid/organic solvent electrolyte

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• 作者：Jin Shi^a ; Feng Shi^b ; ^{shijin1118@163.com" class="auth_mail} ; Ning Song^a ; Jian-Xiong Liu^a ; Xi-Kun Yang^a ; You-Jian Jia^a ; Zheng-Wei Xiao^a ; Ping Du^a
• 关键词：Electrochemical reduction of carbon dioxide ; Ionic liquid/organic solvent electrolyte ; Recycling utilization of carbon dioxide ; Renewable electrical energy storage
• 刊名：Journal of Power Sources
• 出版年：1 August, 2014
• 年：2014
• 卷：259
• 期：Complete
• 页码：50-53
• 全文大小：595 K

文摘

A novel electrolysis cell has been developed for CO₂ reduction to CO in an ionic liquid/organic solvent electrolyte. The electrolysis cell is separated into two compartments by an ion-exchange membrane (Nafion117). The cathode compartment is filled with a CO₂ saturated 1-butyl-3-methyl-imidazolium trifluoromethanesulfonates ([Bmim][CF₃SO₃])/propylene carbonate (PC) solution. The anode compartment is filled with a 0.1聽M H₂SO₄ aqueous solution. A聽Ag foil and a graphite rod are used as the cathode and the anode respectively. In this electrolysis cell, CO₂ reduction can be carried out in the nonaqueous electrolyte, and H₂O oxidation can be carried out in the aqueous solution. Thus CO can be produced from CO₂ and H₂O. Owing to the high solubility of CO₂ in the nonaqueous electrolyte, the Faradaic efficiency of CO formation is high, reached 90.1% at聽鈭?.72聽V (vs Pt wire). After 3聽h electrolysis, no poisonous species are observed on the cathode. The Ag electrode exhibits a high electrocatalytic activity for CO₂ reduction to CO.