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张桥教授、程涛教授及其合作者在Nano Lett.上发表论文
发布时间:2020-11-05 点击:21

题目:

Bismuth Oxyhydroxide-Pt Inverse Interface for Enhanced Methanol Electrooxidation Performance

作者:

Xuchun Wang,#,1 Miao Xie,#,1 Fenglei Lyu,*,1 Yun-Mui Yiu,2 Zhiqiang Wang,2 Jiatang Chen,2 Lo-Yueh Chang,1

Yujian Xia,1 Qixuan Zhong,1 Mingyu Chu,1 Hao Yang,1 Tao Cheng,*,1 Tsun-Kong Sham,*,2 and Qiao Zhang,*,1

单位:

1Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, 215123 Suzhou, China

2Department of Chemistry, University of Western Ontario, London, Ontario N6A5B7, Canada

摘要:

Developing efficient Pt-based electrocatalysts for the methanol oxidation reaction (MOR) is of pivotal importance for large-scale application of direct methanol fuel cells (DMFCs), but Pt suffers from severe deactivation brought by the carbonaceous intermediates such as CO. Here, we demonstrate the formation of a bismuth oxyhydroxide (BiOx(OH)y)-Pt inverse interface via electrochemical reconstruction for enhanced methanol oxidation. By combining density functional theory calculations, X-ray absorption spectroscopy, ambient pressure X-ray photoelectron spectroscopy, and electrochemical characterizations, we reveal that the BiOx (OH)y-Pt inverse interface can induce the electron deficiency of neighboring Pt; this would result in weakened CO adsorption and strengthened OH adsorption, thereby facilitating the removal of the poisonous intermediates and ensuring the high activity and good stability of Pt2Bi sample. This work provides a comprehensive understanding of the inverse interface structure and deep insight into the active sites for MOR, offering great opportunities for rational fabrication of efficient electrocatalysts for DMFCs.

影响因子:

12.279

分区情况:

一区

链接:

https://pubs.acs.org/doi/abs/10.1021/acs.nanolett.0c03340



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