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IrW nanochannel support enabling ultrastable electrocatalytic oxygen evolution at 2 A cm−2 in acidic media

Author

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  • Rui Li

    (Northwestern Polytechnical University
    The Hong Kong Polytechnic University)

  • Haiyun Wang

    (University of Science and Technology of China)

  • Fei Hu

    (Foshan University)

  • K. C. Chan

    (The Hong Kong Polytechnic University)

  • Xiongjun Liu

    (University of Science and Technology Beijing)

  • Zhaoping Lu

    (University of Science and Technology Beijing)

  • Jing Wang

    (University of Science and Technology Beijing)

  • Zhibin Li

    (University of Science and Technology Beijing)

  • Longjiao Zeng

    (Foshan University)

  • Yuanyuan Li

    (Foshan University)

  • Xiaojun Wu

    (University of Science and Technology of China)

  • Yujie Xiong

    (University of Science and Technology of China)

Abstract

A grand challenge for proton exchange membrane electrolyzers is the rational design of oxygen evolution reaction electrocatalysts to balance activity and stability. Here, we report a support-stabilized catalyst, the activated ~200 nm-depth IrW nanochannel that achieves the current density of 2 A cm−2 at an overpotential of only ~497 mV and maintains ultrastable gas evolution at 100 mA cm−2 at least 800 h with a negligible degradation rate of ~4 μV h−1. Structure analyses combined with theoretical calculations indicate that the IrW support alters the charge distribution of surface (IrO2)n clusters and effectively confines the cluster size within 4 (n≤4). Such support-stabilizing effect prevents the surface Ir from agglomeration and retains a thin layer of electrocatalytically active IrO2 clusters on surface, realizing a win-win strategy for ultrahigh OER activity and stability. This work would open up an opportunity for engineering suitable catalysts for robust proton exchange membrane-based electrolyzers.

Suggested Citation

  • Rui Li & Haiyun Wang & Fei Hu & K. C. Chan & Xiongjun Liu & Zhaoping Lu & Jing Wang & Zhibin Li & Longjiao Zeng & Yuanyuan Li & Xiaojun Wu & Yujie Xiong, 2021. "IrW nanochannel support enabling ultrastable electrocatalytic oxygen evolution at 2 A cm−2 in acidic media," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23907-1
    DOI: 10.1038/s41467-021-23907-1
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    Cited by:

    1. Hui Su & Chenyu Yang & Meihuan Liu & Xu Zhang & Wanlin Zhou & Yuhao Zhang & Kun Zheng & Shixun Lian & Qinghua Liu, 2024. "Tensile straining of iridium sites in manganese oxides for proton-exchange membrane water electrolysers," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Zhirong Zhang & Chuanyi Jia & Peiyu Ma & Chen Feng & Jin Yang & Junming Huang & Jiana Zheng & Ming Zuo & Mingkai Liu & Shiming Zhou & Jie Zeng, 2024. "Distance effect of single atoms on stability of cobalt oxide catalysts for acidic oxygen evolution," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    3. Zhaoping Shi & Ji Li & Yibo Wang & Shiwei Liu & Jianbing Zhu & Jiahao Yang & Xian Wang & Jing Ni & Zheng Jiang & Lijuan Zhang & Ying Wang & Changpeng Liu & Wei Xing & Junjie Ge, 2023. "Customized reaction route for ruthenium oxide towards stabilized water oxidation in high-performance PEM electrolyzers," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
    4. Yuannan Wang & Mingcheng Zhang & Zhenye Kang & Lei Shi & Yucheng Shen & Boyuan Tian & Yongcun Zou & Hui Chen & Xiaoxin Zou, 2023. "Nano-metal diborides-supported anode catalyst with strongly coupled TaOx/IrO2 catalytic layer for low-iridium-loading proton exchange membrane electrolyzer," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    5. Xinyu Ping & Yongduo Liu & Lixia Zheng & Yang Song & Lin Guo & Siguo Chen & Zidong Wei, 2024. "Locking the lattice oxygen in RuO2 to stabilize highly active Ru sites in acidic water oxidation," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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