过电位
法拉第效率
催化作用
铜
化学
材料科学
二氧化碳
电流密度
吸收(声学)
化学工程
冶金
无机化学
电化学
电极
物理化学
复合材料
有机化学
物理
工程类
量子力学
作者
Wenjin Zhu,Lei Zhang,Ping Yang,Congling Hu,Hao Dong,Zhi‐Jian Zhao,Rentao Mu,Jinlong Gong
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2018-08-16
卷期号:3 (9): 2144-2149
被引量:91
标识
DOI:10.1021/acsenergylett.8b01286
摘要
Electroreduction (ER) of carbon dioxide (CO2) is a promising way to curb excessive CO2 emission and produce value-added products. Gold–copper (AuCu) alloys are known to exhibit eminent CO production performance toward CO2ER. However, it still remains a grand challenge to balance *COOH and *CO bonding and to further decrease CO onset potential. This Letter describes the construction of Cu vacancies at an abrupt surface over a dealloyed AuCu catalyst to effectively decrease the overpotential and increase CO faradaic efficiency. Dealloyed Au3Cu exhibited a 90.2% CO faradaic efficiency at −0.38 V vs RHE and a 418.60 A/g CO mass current density at −0.8 V. vs RHE, achieving the record for CO production among AuCu catalysts. Combining the experimental and theoretical results, we concluded that the improved performance primarily results from the enhanced *COOH absorption.
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