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Promoting ordering degree of intermetallic fuel cell catalysts by low-melting-point metal doping

Author

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  • Ru-Yang Shao

    (University of Science and Technology of China)

  • Xiao-Chu Xu

    (University of Science and Technology of China)

  • Zhen-Hua Zhou

    (University of Science and Technology of China)

  • Wei-Jie Zeng

    (University of Science and Technology of China)

  • Tian-Wei Song

    (University of Science and Technology of China)

  • Peng Yin

    (University of Science and Technology of China)

  • Ang Li

    (University of Science and Technology of China)

  • Chang-Song Ma

    (University of Science and Technology of China)

  • Lei Tong

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Yuan Kong

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Hai-Wei Liang

    (University of Science and Technology of China
    University of Science and Technology of China)

Abstract

Carbon supported intermetallic compound nanoparticles with high activity and stability are promising cathodic catalysts for oxygen reduction reaction in proton-exchange-membrane fuel cells. However, the synthesis of intermetallic catalysts suffers from large diffusion barrier for atom ordering, resulting in low ordering degree and limited performance. We demonstrate a low-melting-point metal doping strategy for the synthesis of highly ordered L10-type M-doped PtCo (M = Ga, Pb, Sb, Cu) intermetallic catalysts. We find that the ordering degree of the M-doped PtCo catalysts increases with the decrease of melting point of M. Theoretic studies reveal that the low-melting-point metal doping can decrease the energy barrier for atom diffusion. The prepared highly ordered Ga-doped PtCo catalyst exhibits a large mass activity of 1.07 A mgPt−1 at 0.9 V in H2-O2 fuel cells and a rated power density of 1.05 W cm−2 in H2-air fuel cells, with a Pt loading of 0.075 mgPt cm−2.

Suggested Citation

  • Ru-Yang Shao & Xiao-Chu Xu & Zhen-Hua Zhou & Wei-Jie Zeng & Tian-Wei Song & Peng Yin & Ang Li & Chang-Song Ma & Lei Tong & Yuan Kong & Hai-Wei Liang, 2023. "Promoting ordering degree of intermetallic fuel cell catalysts by low-melting-point metal doping," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41590-2
    DOI: 10.1038/s41467-023-41590-2
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    References listed on IDEAS

    as
    1. Mark K. Debe, 2012. "Electrocatalyst approaches and challenges for automotive fuel cells," Nature, Nature, vol. 486(7401), pages 43-51, June.
    2. Wei-Jie Zeng & Chang Wang & Qiang-Qiang Yan & Peng Yin & Lei Tong & Hai-Wei Liang, 2022. "Phase diagrams guide synthesis of highly ordered intermetallic electrocatalysts: separating alloying and ordering stages," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
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