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<p>The rational construction of heterogeneous interfacial engineering presents a critical strategy for advancing efficient electrochemical water-splitting development. Here, a bimetallic sulfide-coupled MoNi alloy heterostructure catalyst (VMoS/MoNi) is synthesized via hydrothermal and sulfidation methods for high-performance alkaline water electrolysis. Benefiting from interfacial coupling within the VMoS/MoNi catalyst, the active sites are enriched, and electron transfer is promoted, leading to enhanced synergy and collaboration in electrocatalytic reactions. As a result, at 10&#xa0;mA·cm<sup>−2</sup>, the VMoS/MoNi catalyst demonstrates excellent HER (26&#xa0;mV) and OER (223&#xa0;mV) performance. VMoS/MoNi catalysts used as double electrode in an alkaline electrolytic assembly are noteworthy for achieving a cell voltage of 1.56&#xa0;V at 10&#xa0;mA·cm<sup>−2</sup>, a significant improvement above most previously reported bifunctional electrocatalysts. This result provides further momentum for the design of heterostructure electrocatalysts, advancing the study of renewable energy conversion and storage.</p>

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Effective hydrogen evolution enabled by heterogeneous interface engineering in bimetallic sulfide with MoNi alloy

  • 期刊论文

  • 发表日期：

    2025年2月11日

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  • Min Xi,
  • An-Ran Chen,
  • Ling-Feng Yang,
  • You-Yu Long,
  • Hua Zhang,
  • Xu-Guang An,
  • Qiao-Zhi Xiao,
  • Tao Sun,
  • Xue-Chun Xiao,
  • Ping Xu,
  • Guang-Zhi Hu

摘要

The rational construction of heterogeneous interfacial engineering presents a critical strategy for advancing efficient electrochemical water-splitting development. Here, a bimetallic sulfide-coupled MoNi alloy heterostructure catalyst (VMoS/MoNi) is synthesized via hydrothermal and sulfidation methods for high-performance alkaline water electrolysis. Benefiting from interfacial coupling within the VMoS/MoNi catalyst, the active sites are enriched, and electron transfer is promoted, leading to enhanced synergy and collaboration in electrocatalytic reactions. As a result, at 10 mA·cm−2, the VMoS/MoNi catalyst demonstrates excellent HER (26 mV) and OER (223 mV) performance. VMoS/MoNi catalysts used as double electrode in an alkaline electrolytic assembly are noteworthy for achieving a cell voltage of 1.56 V at 10 mA·cm−2, a significant improvement above most previously reported bifunctional electrocatalysts. This result provides further momentum for the design of heterostructure electrocatalysts, advancing the study of renewable energy conversion and storage.