铜
催化作用
吸附
电化学
化学
无机化学
电解质
电催化剂
碳纤维
化学工程
碘化物
复合数
材料科学
电极
物理化学
复合材料
有机化学
工程类
作者
Hefei Li,Tian-Fu Liu,Pengfei Wei,Lanying Lin,Dunfeng Gao,Guoxiong Wang,Xinhe Bao
标识
DOI:10.1002/anie.202102657
摘要
Electrochemical CO2 reduction reaction (CO2RR) to multicarbon hydrocarbon and oxygenate (C2+) products with high energy density and wide availability is of great importance, as it provides a promising way to achieve the renewable energy storage and close the carbon cycle. Herein we design a Cu-CuI composite catalyst with abundant Cu0/Cu+ interfaces by physically mixing Cu nanoparticles and CuI powders. The composite catalyst achieves a remarkable C2+ partial current density of 591 mA cm−2 at −1.0 V vs. reversible hydrogen electrode in a flow cell, substantially higher than Cu (329 mA cm−2) and CuI (96 mA cm−2) counterparts. Induced by alkaline electrolyte and applied potential, the Cu-CuI composite catalyst undergoes significant reconstruction under CO2RR conditions. The high-rate C2+ production over Cu-CuI is ascribed to the presence of residual Cu+ and adsorbed iodine species which improve CO adsorption and facilitate C−C coupling.
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