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<p>The activation energy barrier in electrochemical reactions can be effectively lowered by developing efficient water electrolysis catalysts, demonstrating strong potential for cost reduction in hydrogen production. An electroless deposition approach is developed in this work for synthesizing NiCoCuFeP high-entropy alloy (NCCFP-HEA) electrocatalysts on nickel foam (NF) substrates, demonstrating enhanced catalytic performance. The high density of active sites in the high-entropy alloy, combined with the synergistic interaction between phosphorus (P) and the transition metals (Ni, Fe, Co, Cu), significantly enhances the electrocatalyst's catalytic performance. In 1.0&#xa0;M KOH electrolyte, the NCCFP-HEA catalyst achieves a low hydrogen evolution overpotential of 38.2&#xa0;mV at 10&#xa0;mA&#xa0;cm<sup>−2</sup>, accompanied by a Tafel slope of 57.2&#xa0;mV&#xa0;dec<sup>−1</sup>. Furthermore, the catalyst has excellent operational stability with negligible potential degradation in a 48-h chrono-potential test in 1.0&#xa0;M KOH electrolyte. Additionally, this work not only demonstrates the superiority of electroless deposition in synthesizing high-entropy alloys but also provides new insights into designing high-entropy alloy electrocatalysts for hydrogen production from electrolytic water.</p>

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Facile synthesis of NiCoCuFeP high-entropy alloy electrocatalysts via electroless deposition for high-efficient hydrogen evolution

  • 期刊论文

  • 发表日期：

    2025年8月27日

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  • Xinyuan Jiang,
  • Ning Kang,
  • Mengzhu Chu,
  • Zhaojun Liu,
  • Hongxiao Ma,
  • Xin Liu,
  • Guangwen Xie

摘要

The activation energy barrier in electrochemical reactions can be effectively lowered by developing efficient water electrolysis catalysts, demonstrating strong potential for cost reduction in hydrogen production. An electroless deposition approach is developed in this work for synthesizing NiCoCuFeP high-entropy alloy (NCCFP-HEA) electrocatalysts on nickel foam (NF) substrates, demonstrating enhanced catalytic performance. The high density of active sites in the high-entropy alloy, combined with the synergistic interaction between phosphorus (P) and the transition metals (Ni, Fe, Co, Cu), significantly enhances the electrocatalyst's catalytic performance. In 1.0 M KOH electrolyte, the NCCFP-HEA catalyst achieves a low hydrogen evolution overpotential of 38.2 mV at 10 mA cm−2, accompanied by a Tafel slope of 57.2 mV dec−1. Furthermore, the catalyst has excellent operational stability with negligible potential degradation in a 48-h chrono-potential test in 1.0 M KOH electrolyte. Additionally, this work not only demonstrates the superiority of electroless deposition in synthesizing high-entropy alloys but also provides new insights into designing high-entropy alloy electrocatalysts for hydrogen production from electrolytic water.