过电位
格式化
材料科学
选择性
电化学
钯
合金
吸附
铜
化学工程
无机化学
双金属片
金属
化学
催化作用
冶金
电极
物理化学
有机化学
工程类
作者
Rui Zhou,Xing Fan,Xiaoxing Ke,Jie Xu,Xuan Zhao,Jia Horng Lin,Binbin Pan,Na Han,Lixing Li,Xijun Liu,Jun Luo,Haiping Lin,Yanguang Li
出处
期刊:Nano Letters
[American Chemical Society]
日期:2021-04-21
卷期号:21 (9): 4092-4098
被引量:73
标识
DOI:10.1021/acs.nanolett.1c01113
摘要
Pd is the only metal that can catalyze electrochemical CO2 reduction to formate at close-to-zero overpotential. It is unfortunately subjected to severe poisoning by trace CO as the side product and suffers from deteriorating stability and selectivity with increasing overpotential. Here, we demonstrate that alloying Pd with Cu in the form of two-dimensional nanodendrites could enable highly stable and selective formate production. Such unique bimetallic nanostructures are formed as a result of the rapid in-plane growth and suppressed out-of-plane growth by carefully controlling a set of experimental parameters. Thanks to the combined electronic effect and nanostructuring effect, our alloy product catalyzes CO2 reduction to formate with remarkable stability and selectivity under the working potential as cathodic as −0.4 V. Our results are rationalized by computational simulations, evidencing that Cu atoms weaken the *CO adsorption and stabilize the *OCHO adsorption on neighboring Pd atoms.
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