氧合物
催化作用
选择性
电催化剂
化学
法拉第效率
化学工程
无机化学
碳纤维
电化学
材料科学
电极
有机化学
物理化学
复合材料
复合数
工程类
作者
Yisen Yang,Jianling Zhang,Zhonghao Tan,Jie Yang,Sha Wang,Meiling Li,Zhuizhui Su
标识
DOI:10.1002/anie.202408873
摘要
The acidic electrocatalytic conversion of CO2 to multi‐carbon (C2+) oxygenates is of great importance in view of enhancing carbon utilization efficiency and generating products with high energy densities, but suffering from low selectivity and activity. Herein, we synthesized Ag‐Cu alloy catalyst with highly rough surface, by which the selectivity to C2+ oxygenates can be greatly improved. In a strongly acidic condition (pH=0.75), the maximum C2+ products Faradaic efficiency (FE) and C2+ oxygenates FE reach 80.4% and 56.5% at ‐1.9 V versus reversible hydrogen electrode, respectively, with a ratio of FEC2+ oxygenates to FEethylene up to 2.36. At this condition, the C2+ oxygenates partial current density is as high as 480 mA cm‐2. The in situ Raman measurements and control experiments indicate that the high generation of C2+ oxygenates over the catalyst originates from its large surface roughness and Ag alloying.
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