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Synthesis of noble metal nanoarrays via agglomeration and metallurgy for acidic water electrolysis

Author

Listed:
  • Jiawei Tao

    (Shanghai Jiao Tong University)

  • Ruiqin Gao

    (NingboTech University)

  • Geyu Lin

    (Shanghai Jiao Tong University)

  • Chaoyang Chu

    (ShanghaiTech University)

  • Yan Sun

    (Shanghai Jiao Tong University)

  • Chunyang Yu

    (Shanghai Jiao Tong University)

  • Yanhang Ma

    (ShanghaiTech University)

  • Huibin Qiu

    (Shanghai Jiao Tong University)

Abstract

Noble metal electrocatalysts remain the mainstay for proton exchange membrane water electrolysis, majorly due to their exceptional activity and durability in acidic media. However, conventional powder and particle catalysts intensively suffer from aggregation, shedding and poor electron conductivity in practical applications. Here, we develop a micellar brush-guided method to agglomerate and smelt metal nanoparticles into erect nanoarrays with designable constitutions on various substrates. While the nanoarrays of stacked nanoparticles show poor stability in the acidic media, the smelting treatment substantially enhances the electron conductivity by more than four order of magnitude and reinforces the nanoarray architectures. This allows the tailored fabrication of self-supported acid-durable metallic and alloy nanoarray catalysts with outstanding hydrogen evolution activity, and metal oxide nanoarray with extraordinary oxygen evolution activity. The integration of metallic Ru-nanoarray and RuOx-nanoarray in a proton exchange membrane electrolyzer further enables a long-term stable water electrolysis process for more than 500 h at 1 A cm−2.

Suggested Citation

  • Jiawei Tao & Ruiqin Gao & Geyu Lin & Chaoyang Chu & Yan Sun & Chunyang Yu & Yanhang Ma & Huibin Qiu, 2025. "Synthesis of noble metal nanoarrays via agglomeration and metallurgy for acidic water electrolysis," Nature Communications, Nature, vol. 16(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-60419-8
    DOI: 10.1038/s41467-025-60419-8
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    References listed on IDEAS

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