格式化
溶剂化电子
草酸盐
化学
放射分析
离子
水溶液
电化学
大气压力
无机化学
动力学
化学动力学
阴极
光化学
分析化学(期刊)
物理化学
电极
有机化学
催化作用
地质学
物理
海洋学
量子力学
作者
Paul Rumbach,Rui Xu,David B. Go
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2016-01-01
卷期号:163 (10): F1157-F1161
被引量:36
摘要
In this work, we use an atmospheric-pressure plasma in argon as a cathode to electrochemically reduce carbon dioxide in aqueous solution. Using optical absorption spectroscopy, we directly show that solvated electrons reduce CO2(aq) to form the carboxyl radical anion CO2−(aq), and the reaction obeys 3D bulk reaction kinetics similar to those measured in radiolysis experiments. We then use liquid ion chromatography to show that the CO2− (aq) intermediate ultimately reacts to produce oxalate and formate. The overall faradaic efficiency of the reaction is close to 10% for a CO2(aq) concentration of 34 mM. However, given the known reaction kinetics of solvated electrons, this efficiency should approach 100% as the concentration of CO2(aq) is increased.
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