Surface Anion Promotes Pt Electrocatalysts with High CO Tolerance in Fuel-Cell Performance

被引：3

作者：

Cheng, Han ^{[1
]}

Xia, Jun ^{[2
]}

Wang, Minghao ^{[1
]}

Wang, Chun ^{[1
]}

Gui, Renjie ^{[1
]}

Cao, Xuemin ^{[1
]}

Zhou, Tianpei ^{[1
]}

Zheng, Xusheng ^{[3
]}

Chu, Wangsheng ^{[3
]}

Wu, Hengan ^{[2
]}

Xie, Yi ^{[1
,4
]}

Wu, Changzheng ^{[1
,4
]}

机构：

[1] School of Chemistry and Materials Science, University of Science and Technology of China, Anhui, Hefei,230026, China

[2] CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Complex System Mechanics, University of Science and Technology of China, Hefei,230027, China

[3] National Synchrotron Radiation Laboratory, University of Science and Technology of China, Anhui, Hefei,230029, China

[4] Institute of Energy, Hefei Comprehensive National Science Center, Anhui, Hefei,230026, China

来源：

Journal of the American Chemical Society | 2022年 / 144卷 / 48期

基金：

中国国家自然科学基金;

关键词：

Electrocatalysts - Electrolysis - Platinum - Proton exchange membrane fuel cells (PEMFC);

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Platinum reaches considerable activity and stability as an electrocatalyst but is not always capable of maintaining such performance under CO poisoning, particularly in CO residual fuels for practical proton-exchange membrane fuel cells (PEMFCs). In this work, we report that surface anions including a series of nonmetal elements on Pt nanoparticles result in outstanding CO tolerance for electrocatalysts in fuel cells. In particular, phosphorus surface-anion-modified Pt (denoted as P-Pt) possesses more than 10-fold enhancement of CO tolerance (only 8.4% decay) than commercial Pt/C, which can serve as a robust electrocatalyst both in CO poisoning half cells and full cells. Moreover, the general mechanism and principle were proposed, stating that surface anions should be selected preferentially to offer electron feedback to downshift the d-band center for the Pt surface, successfully weakening CO adsorption and leading to high-tolerance capability. We anticipate that surface anions on a Pt surface can bring robust electrocatalysts for practical PEMFCs and offer novel insights for high-performance Pt-based electrocatalysts. © 2022 American Chemical Society.

引用

页码：22018 / 22025