PtFe Nanoalloys Supported on Fe‐Based Cubic Framework as Efficient Oxygen Reduction Electrocatalysts for Proton Exchange Membrane Fuel Cells
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Published:2023-09-21
Issue:1
Volume:34
Page:
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ISSN:1616-301X
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Container-title:Advanced Functional Materials
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language:en
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Short-container-title:Adv Funct Materials
Author:
Wu Yinlong1,
Chen Liming1,
Geng Shipeng1,
Tian Yuhui2,
Chen Rui1,
Wang Kun1,
Wang Yi1,
Song Shuqin1ORCID
Affiliation:
1. The Key Lab of Low‐Carbon Chemistry & Energy Conservation of Guangdong Province PCFM Lab School of Materials Science and Engineering School of Chemical Engineering and Technology Sun Yat‐sen University Guangzhou 510275 P. R. China
2. School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
Abstract
AbstractWhile Pt‐based binary alloys hold promising potential as cathode catalysts in proton exchange membrane fuel cells (PEMFCs) due to their desirable properties compared with monometallic counterparts, their weak interactions with carbon support make them challenging for practical cell implementation. Here, the PtFe alloys are uniformly deposited onto the surface of Fe‐Nx‐enriched nanocubes (FeNC) via surface confinement and internal vapor phase etching. The combined action of PtFe alloy and FeNC support acts as the electronic structure modulator resulting in the optimized intermediate adsorption (revealed by density function theory calculations), thereby boosting intrinsic activity to oxygen reduction reaction (ORR) and simultaneously enhancing their interactions. The resultant Pt1Fe1 @ Fe0.5NC‐900 catalyst with a low Pt loading (0.065 mgPt cm−2) exhibits excellent mass activity and stability toward ORR in acidic media. When incorporated into a PEMFC, it delivers a superior peak power density of 1.05 W cm−2 and satisfactory stability performance.
Funder
National Natural Science Foundation of China
Basic and Applied Basic Research Foundation of Guangdong Province
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
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