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Shielded goethite catalyst that enables fast water dissociation in bipolar membranes

Author

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  • Muhammad A. Shehzad

    (University of Science and Technology of China
    University of Engineering and Technology Lahore)

  • Aqsa Yasmin

    (University of Science and Technology of China
    University of Engineering and Technology Lahore)

  • Xiaolin Ge

    (University of Science and Technology of China)

  • Zijuan Ge

    (University of Science and Technology of China)

  • Kaiyu Zhang

    (University of Science and Technology of China)

  • Xian Liang

    (University of Science and Technology of China)

  • Jianjun Zhang

    (University of Science and Technology of China)

  • Geng Li

    (University of Science and Technology of China)

  • Xinle Xiao

    (University of Science and Technology of China)

  • Bin Jiang

    (University of Science and Technology of China)

  • Liang Wu

    (University of Science and Technology of China)

  • Tongwen Xu

    (University of Science and Technology of China)

Abstract

Optimal pH conditions for efficient artificial photosynthesis, hydrogen/oxygen evolution reactions, and photoreduction of carbon dioxide are now successfully achievable with catalytic bipolar membranes-integrated water dissociation and in-situ acid-base generations. However, inefficiency and instability are severe issues in state-of-the-art membranes, which need to urgently resolve with systematic membrane designs and innovative, inexpensive junctional catalysts. Here we show a shielding and in-situ formation strategy of fully-interconnected earth-abundant goethite Fe+3O(OH) catalyst, which lowers the activation energy barrier from 5.15 to 1.06 eV per HO − H bond and fabricates energy-efficient, cost-effective, and durable shielded catalytic bipolar membranes. Small water dissociation voltages at limiting current density (ULCD: 0.8 V) and 100 mA cm−2 (U100: 1.1 V), outstanding cyclic stability at 637 mA cm−2, long-time electro-stability, and fast acid-base generations (H2SO4: 3.9 ± 0.19 and NaOH: 4.4 ± 0.21 M m−2 min−1 at 100 mA cm−2) infer confident potential use of the novel bipolar membranes in emerging sustainable technologies.

Suggested Citation

  • Muhammad A. Shehzad & Aqsa Yasmin & Xiaolin Ge & Zijuan Ge & Kaiyu Zhang & Xian Liang & Jianjun Zhang & Geng Li & Xinle Xiao & Bin Jiang & Liang Wu & Tongwen Xu, 2021. "Shielded goethite catalyst that enables fast water dissociation in bipolar membranes," Nature Communications, Nature, vol. 12(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20131-1
    DOI: 10.1038/s41467-020-20131-1
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    Cited by:

    1. Ziang Xu & Lei Wan & Yiwen Liao & Maobin Pang & Qin Xu & Peican Wang & Baoguo Wang, 2023. "Continuous ammonia electrosynthesis using physically interlocked bipolar membrane at 1000 mA cm−2," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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