铜
过电位
法拉第效率
氧化物
二氧化碳电化学还原
水溶液
电解质
醋酸
化学
无机化学
电化学
可逆氢电极
电极
材料科学
催化作用
一氧化碳
参比电极
有机化学
物理化学
作者
Qinggong Zhu,Xiaofu Sun,Dexin Yang,Jun Ma,Xinchen Kang,Lirong Zheng,Jing Zhang,Zhonghua Wu,Buxing Han
标识
DOI:10.1038/s41467-019-11599-7
摘要
Abstract Efficient electroreduction of carbon dioxide to multicarbon products in aqueous solution is of great importance and challenging. Unfortunately, the low efficiency of the production of C 2 products limits implementation at scale. Here, we report reduction of carbon dioxide to C 2 products (acetic acid and ethanol) over a 3D dendritic copper-cuprous oxide composite fabricated by in situ reduction of an electrodeposited copper complex. In potassium chloride aqueous electrolyte, the applied potential was as low as −0.4 V vs reversible hydrogen electrode, the overpotential is only 0.53 V (for acetic acid) and 0.48 V (for ethanol) with high C 2 Faradaic efficiency of 80% and a current density of 11.5 mA cm −2 . The outstanding performance of the electrode for producing the C 2 products results mainly from near zero contacting resistance between the electrocatalysts and copper substrate, abundant exposed active sites in the 3D dendritic structure and suitable copper(I)/copper(0) ratio of the electrocatalysts.
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