电合成
化学
法拉第效率
电化学
催化作用
钴
电解
选择性
电极
无机化学
氧化还原
化学工程
纳米技术
有机化学
材料科学
物理化学
工程类
电解质
作者
Xingxin Jiang,Xiaohui Ren,Rongsheng Chen,Feng Ma,Wenping He,Tian Zhang,Ying Wen,Li Shi,Long Ren,Zongyu Huang,Xusheng Wang,Hongwei Ni
标识
DOI:10.1016/j.jelechem.2023.117860
摘要
Electrochemical conversion of CO2 into CO, powered by renewable electricity, offers one means to address the need for the storage of intermittent renewable energy. However, it is challenging because the competing HER is hard to avoid, which significantly compromises the selectivity to CO and reduces the efficiency of CO2RR devices. This study reports a cooperative catalyst design of metal–molecule catalyst interfaces with the goal of high local concentration of CO2 and stabilizing the intermediate, which improves the electrosynthesis of CO. The strategy is implemented by functionalizing the silver surface with cobalt (II)-complexes to promote the selective electrolysis of CO2 to CO. We report a CO2-to-CO Faradaic efficiency of 98.5 % and a partial current density of 16.52 mA cm−2 at − 1.1 V vs. RHE. Mechanism studies reveal that the catalytic performance of the Ag/Co(bpy)32+ correlates with the metal–molecule interaction, which provide new opportunities for construction and design of high-efficient catalysts toward CO2 reduction.
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