School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan, 471003, China.
Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China.
Angew Chem Int Ed Engl. 2017 Sep 18;56(39):11851-11854. doi: 10.1002/anie.201703977. Epub 2017 Aug 18.
Photoelectrochemical (PEC) reduction of carbon dioxide (CO ) is a potential method for production of fuels and chemicals from a C1 feedstock accumulated in the atmosphere. However, the low solubility of CO in water, and complicated processes associated with capture and conversion, render CO conversion inefficient. A new concept is proposed in which a PEC system is used to capture and convert CO into formic acid. The process is assisted by an ionic liquid (1-aminopropyl-3-methylimidazolium bromide) aqueous solution, which functions as an absorbent and electrolyte at ambient temperature and pressure. Within this PEC reduction strategy, the ionic liquid plays a critical role in promoting the conversion of CO to formic acid and suppressing the reduction of H O to H . At an applied voltage of 1.7 V, the Faradaic efficiency for formic acid production is as high as 94.1 % and the electro-to-chemical efficiency is 86.2 %.
光电化学（PEC）还原二氧化碳（CO ）是一种从大气中积累的 C1 原料生产燃料和化学品的潜在方法。然而，CO 在水中的低溶解度以及与捕获和转化相关的复杂过程，使得 CO 的转化效率低下。提出了一个新概念，即在 PEC 系统中使用 CO 捕获和转化为甲酸。该过程由室温下的离子液体（1-氨基丙基-3-甲基咪唑溴）水溶液辅助，该溶液在室温下作为吸收剂和电解质起作用和压力。在这种 PEC 还原策略中，离子液体在促进 CO 转化为甲酸和抑制 H O 还原为 H 方面起着关键作用。在 1.7 V 的外加电压下，甲酸的法拉第效率高达 94.1%，电化学反应效率为 86.2%。
