科学通报(英文版)2024，Vol.69Issue(8) ：1061-1070.DOI:10.1016/j.scib.2024.01.009

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

Xian Wang Xiaolong Yang Ying Wang Bingbao Mei Zhao Jin Yang Li Zhaoping Shi Zheng Jiang Changpeng Liu Wei Xing Junjie Ge
科学通报(英文版)2024，Vol.69Issue(8) ：1061-1070.DOI:10.1016/j.scib.2024.01.009
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Single atom sites as CO scavenger to allow for crude hydrogen usage in PEMFC

Xian Wang 1Xiaolong Yang 1Ying Wang 2Bingbao Mei 3Zhao Jin 4Yang Li 1Zhaoping Shi 1Zheng Jiang 5Changpeng Liu 1Wei Xing 1Junjie Ge1
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作者信息

  • 1. 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
  • 2. State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
  • 3. Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201204,China;University of Chinese Academy of Sciences,Beijing 100049,China
  • 4. 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
  • 5. Shanghai Synchrotron Radiation Facility,Zhangjiang National Lab,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China;University of Chinese Academy of Sciences,Beijing 100049,China
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Abstract

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.

Key words

CO-tolerant anode catalyst/Fuel cells/Dual metal catalysts/Bifunctional catalyst

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基金项目

National Key Research and Development Program of China(2022YFB4004100)

National Natural Science Foundation of China(U22A20396)

National Natural Science Foundation of China(22209168)

Natural Science Foundation of Anhui Province(2208085UD04)

China Postdoctoral Science Foundation(2023M743375)

出版年

2024
科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
参考文献量41
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