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Janus electronic state of supported iridium nanoclusters for sustainable alkaline water electrolysis

Author

Listed:
  • Yaoda Liu

    (Xi’an Jiaotong University)

  • Lei Li

    (Xi’an Jiaotong University)

  • Li Wang

    (Central South University)

  • Na Li

    (Central South University)

  • Xiaoxu Zhao

    (Peking University)

  • Ya Chen

    (Xi’an Jiaotong University)

  • Thangavel Sakthivel

    (Kumoh National Institute of Technology)

  • Zhengfei Dai

    (Xi’an Jiaotong University)

Abstract

Metal-support electronic interactions play crucial roles in triggering the hydrogen spillover (HSo) to boost hydrogen evolution reaction (HER). It requires the supported metal of electron-rich state to facilitate the proton adsorption/spillover. However, this electron-rich metal state contradicts the traditional metal→support electron transfer protocol and is not compatible with the electron-donating oxygen evolution reaction (OER), especially in proton-poor alkaline conditions. Here we profile an Ir/NiPS3 support structure to study the Ir electronic states and performances in HSo/OER-integrated alkaline water electrolysis. The supported Ir is evidenced with Janus electron-rich and electron-poor states at the tip and interface regions to respectively facilitate the HSo and OER processes. Resultantly, the water electrolysis (WE) is efficiently implemented with 1.51 V at 10 mA cm–2 for 1000 h in 1 M KOH and 1.44 V in urea-KOH electrolyte. This research clarifies the Janus electronic state as fundamental in rationalizing efficient metal-support WE catalysts.

Suggested Citation

  • Yaoda Liu & Lei Li & Li Wang & Na Li & Xiaoxu Zhao & Ya Chen & Thangavel Sakthivel & Zhengfei Dai, 2024. "Janus electronic state of supported iridium nanoclusters for sustainable alkaline water electrolysis," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47045-6
    DOI: 10.1038/s41467-024-47045-6
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