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Atomically dispersed Iridium on Mo2C as an efficient and stable alkaline hydrogen oxidation reaction catalyst

Author

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  • Jinjie Fang

    (Beijing University of Chemical Technology)

  • Haiyong Wang

    (Beijing University of Chemical Technology)

  • Qian Dang

    (Beijing University of Chemical Technology)

  • Hao Wang

    (Beijing University of Chemical Technology)

  • Xingdong Wang

    (Beijing University of Chemical Technology)

  • Jiajing Pei

    (Beijing University of Chemical Technology)

  • Zhiyuan Xu

    (Beijing University of Chemical Technology)

  • Chengjin Chen

    (Beijing University of Chemical Technology)

  • Wei Zhu

    (Beijing University of Chemical Technology)

  • Hui Li

    (Beijing University of Chemical Technology)

  • Yushan Yan

    (University of Delaware)

  • Zhongbin Zhuang

    (Beijing University of Chemical Technology
    Beijing University of Chemical Technology)

Abstract

Hydroxide exchange membrane fuel cells (HEMFCs) have the advantages of using cost-effective materials, but hindered by the sluggish anodic hydrogen oxidation reaction (HOR) kinetics. Here, we report an atomically dispersed Ir on Mo2C nanoparticles supported on carbon (IrSA-Mo2C/C) as highly active and stable HOR catalysts. The specific exchange current density of IrSA-Mo2C/C is 4.1 mA cm−2ECSA, which is 10 times that of Ir/C. Negligible decay is observed after 30,000-cycle accelerated stability test. Theoretical calculations suggest the high HOR activity is attributed to the unique Mo2C substrate, which makes the Ir sites with optimized H binding and also provides enhanced OH binding sites. By using a low loading (0.05 mgIr cm−2) of IrSA-Mo2C/C as anode, the fabricated HEMFC can deliver a high peak power density of 1.64 W cm−2. This work illustrates that atomically dispersed precious metal on carbides may be a promising strategy for high performance HEMFCs.

Suggested Citation

  • Jinjie Fang & Haiyong Wang & Qian Dang & Hao Wang & Xingdong Wang & Jiajing Pei & Zhiyuan Xu & Chengjin Chen & Wei Zhu & Hui Li & Yushan Yan & Zhongbin Zhuang, 2024. "Atomically dispersed Iridium on Mo2C as an efficient and stable alkaline hydrogen oxidation reaction catalyst," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48672-9
    DOI: 10.1038/s41467-024-48672-9
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    References listed on IDEAS

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