Single atom sites as CO scavenger to allow for crude hydrogen usage in PEMFC

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：Nanosized Pt catalysts are the catalyst-of-choice for proton exchange membrane fuel cell(PEMFC)anode,but are limited by their extreme sensitivity to CO in parts per million(ppm)level,thereby making the use of ultrapure H2 a prerequisite to ensure acceptable performance.Herein,we confront the CO poisoning issue by bringing the Ir/Rh single atom sites to synergistically working with their metallic counterparts.In presence of 1000 ppm CO,the catalyst represents not only undisturbed H2 oxidation reaction(HOR)catalytic behavior in electrochemical cell,but also unparalleled peak power density at 643 mW cm-2 in single cell,27-fold in mass activity of the best PtRu/C catalysts available.Pre-poisoning experiments and surface-enhanced Raman scattering spectroscopy(SERS)and calculation results in combine suggest the presence of adjacent Ir/Rh single atom sites(SASs)to the nanoparticles(NPs)as the origin for this prominent catalytic behavior.The single sites not only exhibit superb CO oxidation performance by themselves,but can also scavenge the CO adsorbed on approximated NPs via supplying reactive OH*spe-cies.We open up a new route here to conquer the formidable CO poisoning issue through single atom and nanoparticle synergistic catalysis,and pave the way towards a more robust PEMFC future.

外文关键词：

CO-tolerant anode catalystFuel cellsDual metal catalystsBifunctional catalyst

作者：

Xian Wang、Xiaolong Yang、Ying Wang、Bingbao Mei、Zhao Jin、Yang Li、Zhaoping Shi、Zheng Jiang、Changpeng Liu、Wei Xing、Junjie Ge

展开 >

作者单位：

State Key Laboratory of Electroanalytic Chemistry,Jilin Province Key Laboratory of Low Carbon Chemistry Power,Institution Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China

School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China

State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China

Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201204,China

University of Chinese Academy of Sciences,Beijing 100049,China

Shanghai Synchrotron Radiation Facility,Zhangjiang National Lab,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China

展开 >

基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Anhui ProvinceChina Postdoctoral Science Foundation

项目编号：

2022YFB4004100U22A20396222091682208085UD042023M743375

出版年：

2024

DOI：

10.1016/j.scib.2024.01.009

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

年,卷(期)：2024.69(8)

参考文献量41