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An iron-base oxygen-evolution electrode for high-temperature electrolyzers

Author

Listed:
  • Kaifa Du

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

  • Enlai Gao

    (Wuhan University)

  • Chunbo Zhang

    (Wuhan University)

  • Yongsong Ma

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

  • Peilin Wang

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

  • Rui Yu

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

  • Wenmiao Li

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

  • Kaiyuan Zheng

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

  • Xinhua Cheng

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

  • Diyong Tang

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

  • Bowen Deng

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

  • Huayi Yin

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

  • Dihua Wang

    (Wuhan University
    Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy)

Abstract

High-temperature molten-salt electrolyzers play a central role in metals, materials and chemicals production for their merit of favorable kinetics. However, a low-cost, long-lasting, and efficient high-temperature oxygen evolution reaction (HT-OER) electrode remains a big challenge. Here we report an iron-base electrode with an in situ formed lithium ferrite scale that provides enhanced stability and catalytic activity in both high-temperature molten carbonate and chloride salts. The finding is stemmed from a discovery of the ionic potential-stability relationship and a basicity modulation principle of oxide films in molten salt. Using the iron-base electrode, we build a kiloampere-scale molten carbonate electrolyzer to efficiently convert CO2 to carbon and oxygen. More broadly, the design principles lay the foundations for exploring cheap, Earth-abundant, and long-lasting HT-OER electrodes for electrochemical devices with molten carbonate and chloride electrolytes.

Suggested Citation

  • Kaifa Du & Enlai Gao & Chunbo Zhang & Yongsong Ma & Peilin Wang & Rui Yu & Wenmiao Li & Kaiyuan Zheng & Xinhua Cheng & Diyong Tang & Bowen Deng & Huayi Yin & Dihua Wang, 2023. "An iron-base oxygen-evolution electrode for high-temperature electrolyzers," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-35904-7
    DOI: 10.1038/s41467-023-35904-7
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    References listed on IDEAS

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