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<p>Herein, a Cr-doped Ni-Cu/(NiOH)<sub>2</sub> coating supported on nickel foam (Ni-Cu-Cr/NF) was fabricated via a facile one-step electrodeposition strategy and employed as an efficient electrocatalyst for the hydrogen evolution reaction (HER) in alkaline media. In 1&#xa0;M NaOH, Ni–Cu–Cr/NF requires an overpotential of 30&#xa0;mV to reach a current density of − 10&#xa0;mA&#xa0;cm⁻<sup>2</sup> and exhibits a Tafel slope of 55&#xa0;mV dec⁻<sup>1</sup>. These electrochemical results are associated with the combined effects of the multicomponent composition and an increased electrochemically active surface area (ECSA). The ECSA of Ni–Cu–Cr/NF is approximately 23.6 times that of Ni–Cu/NF. In addition, the catalyst maintains stable operation for 60&#xa0;h during continuous electrolysis. This work presents a simple preparation method for the novel Ni-Cu-Cr/NF catalyst and systematically investigates the impact of Cr doping on enhancing catalytic performance, providing an effective strategy for the development of nickel-based alloy electrocatalysts.</p> Graphical Abstract <p></p>

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Cr-doped Ni-Cu/Ni(OH)2 coating supported on nickel foam for efficient hydrogen evolution

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Yanan Hu,
  • Dawei Yang,
  • Qiaoling Li,
  • Chengcheng Yu

摘要

Herein, a Cr-doped Ni-Cu/(NiOH)2 coating supported on nickel foam (Ni-Cu-Cr/NF) was fabricated via a facile one-step electrodeposition strategy and employed as an efficient electrocatalyst for the hydrogen evolution reaction (HER) in alkaline media. In 1 M NaOH, Ni–Cu–Cr/NF requires an overpotential of 30 mV to reach a current density of − 10 mA cm⁻2 and exhibits a Tafel slope of 55 mV dec⁻1. These electrochemical results are associated with the combined effects of the multicomponent composition and an increased electrochemically active surface area (ECSA). The ECSA of Ni–Cu–Cr/NF is approximately 23.6 times that of Ni–Cu/NF. In addition, the catalyst maintains stable operation for 60 h during continuous electrolysis. This work presents a simple preparation method for the novel Ni-Cu-Cr/NF catalyst and systematically investigates the impact of Cr doping on enhancing catalytic performance, providing an effective strategy for the development of nickel-based alloy electrocatalysts.

Graphical Abstract