甲醇
催化作用
氧化物
材料科学
电化学
吸附
化学工程
傅里叶变换红外光谱
甲醇燃料
金属
电化学能量转换
无机化学
化学
电极
物理化学
冶金
有机化学
工程类
作者
Yu Qin,Jinchang Fan,Jiandong Wu,Wen Zhuang Lu,Shengwei Wang,Dewen Wang,Xin Ge,Xiao Zhao,Wei Zhang,Weitao Zheng,Xiaoqiang Cui
出处
期刊:Nano Letters
[American Chemical Society]
日期:2023-10-03
卷期号:23 (20): 9555-9562
被引量:2
标识
DOI:10.1021/acs.nanolett.3c03141
摘要
The effective design and construction of high-performance methanol oxidation reaction (MOR) electrocatalysts are significant for the development of direct methanol fuel cells. But the active sites of the MOR electrocatalysts are susceptible to being poisoned by CO, resulting in poor durability. Herein, we report an atomically dispersed CrOX species anchored on Pd metallene through bridging O atoms. This catalyst shows an outstanding MOR performance with 7 times higher mass activity and 100 mV lower CO electrooxidation potential than commercial Pd/C. The results of operando electrochemical Fourier transform infrared spectroscopy demonstrate the rapid removal of CO* on CrOX-Pd metallene. Theoretical calculations reveal that atomically dispersed CrOX can lower the adsorption energy of CO* on Pd sites and enhance that of OH* through the formation of a hydrogen bond, decreasing the formation energy of COOH*. This work provides a new strategy for improving MOR performance via atomically engineering oxide/metal interfaces.
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