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A pyrolysis-free Ni/Fe bimetallic electrocatalyst for overall water splitting

Author

Listed:
  • Ying Zang

    (South China Normal University
    Zhengzhou University)

  • Di-Qiu Lu

    (South China Normal University)

  • Kun Wang

    (Zhengzhou University
    Nanyang Normal University)

  • Bo Li

    (Nanyang Normal University)

  • Peng Peng

    (Zhengzhou University)

  • Ya-Qian Lan

    (South China Normal University)

  • Shuang-Quan Zang

    (Zhengzhou University)

Abstract

Catalysts capable of electrochemical overall water splitting in acidic, neutral, and alkaline solution are important materials. This work develops bifunctional catalysts with single atom active sites through a pyrolysis-free route. Starting with a conjugated framework containing Fe sites, the addition of Ni atoms is used to weaken the adsorption of electrochemically generated intermediates, thus leading to more optimized energy level sand enhanced catalytic performance. The pyrolysis-free synthesis also ensured the formation of well-defined active sites within the framework structure, providing ideal platforms to understand the catalytic processes. The as-prepared catalyst exhibits efficient catalytic capability for electrochemical water splitting in both acidic and alkaline electrolytes. At a current density of 10 mA cm−2, the overpotential for hydrogen evolution and oxygen evolution is 23/201 mV and 42/194 mV in 0.5 M H2SO4 and 1 M KOH, respectively. Our work not only develops a route towards efficient catalysts applicable across a wide range of pH values, it also provides a successful showcase of a model catalyst for in-depth mechanistic insight into electrochemical water splitting.

Suggested Citation

  • Ying Zang & Di-Qiu Lu & Kun Wang & Bo Li & Peng Peng & Ya-Qian Lan & Shuang-Quan Zang, 2023. "A pyrolysis-free Ni/Fe bimetallic electrocatalyst for overall water splitting," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-37530-9
    DOI: 10.1038/s41467-023-37530-9
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    References listed on IDEAS

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