格式化
法拉第效率
溶解度
化学
电解质
阴极
电化学
催化作用
无机化学
水溶液
二氧化碳电化学还原
化学工程
电极
有机化学
物理化学
一氧化碳
工程类
作者
Wonhee Lee,Youngeun Kim,Myung-Joong Youn,Soon Kwan Jeong,Ki Tae Park
标识
DOI:10.1002/anie.201803501
摘要
Electrochemical reduction of carbon dioxide (CO2 ) into value-added chemicals is a promising strategy to reduce CO2 emission and mitigate climate change. One of the most serious problems in electrocatalytic CO2 reduction (CO2 R) is the low solubility of CO2 in an aqueous electrolyte, which significantly limits the cathodic reaction rate. This paper proposes a facile method of catholyte-free electrocatalytic CO2 reduction to avoid the solubility limitation using commercial tin nanoparticles as a cathode catalyst. Interestingly, as the reaction temperature rises from 303 K to 363 K, the partial current density (PCD) of formate improves more than two times with 52.9 mA cm-2 , despite the decrease in CO2 solubility. Furthermore, a significantly high formate concentration of 41.5 g L-1 is obtained as a one-path product at 343 K with high PCD (51.7 mA cm-2 ) and high Faradaic efficiency (93.3 %) via continuous operation in a full flow cell at a low cell voltage of 2.2 V.
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