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<p>The rapid socioeconomic development and excessive consumption of fossil fuels have given rise to a global energy and environmental crisis. As a clean fuel with high energy density, hydrogen highlights the urgent demand for developing efficient and low-cost electrocatalysts for the hydrogen evolution reaction (HER). In this work, a Ni–Ho catalyst was synthesized via one-step galvanostatic electrodeposition. Its structure and morphology were characterized by XRD, SEM, and other characterization techniques, and its electrochemical performance was investigated by LSV, CV, and other electrochemical techniques in 1&#xa0;M KOH. The Ni–Ho electrode exhibits an overpotential of 79&#xa0;mV at 10&#xa0;mA/cm<sup>2</sup> with a Tafel slope of 152.8&#xa0;mV/dec and maintains excellent stability during long-term electrolysis.</p>

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Research on the preparation of a high-performance Ni–Ho hydrogen evolution catalyst

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Lei Peng,
  • Wenyu Tan,
  • Xiaozhen Cui,
  • Yang Yang,
  • Wei Meng,
  • Wei Liu

摘要

The rapid socioeconomic development and excessive consumption of fossil fuels have given rise to a global energy and environmental crisis. As a clean fuel with high energy density, hydrogen highlights the urgent demand for developing efficient and low-cost electrocatalysts for the hydrogen evolution reaction (HER). In this work, a Ni–Ho catalyst was synthesized via one-step galvanostatic electrodeposition. Its structure and morphology were characterized by XRD, SEM, and other characterization techniques, and its electrochemical performance was investigated by LSV, CV, and other electrochemical techniques in 1 M KOH. The Ni–Ho electrode exhibits an overpotential of 79 mV at 10 mA/cm2 with a Tafel slope of 152.8 mV/dec and maintains excellent stability during long-term electrolysis.