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<p>This study is devoted to the preparation of a Ni–Al alloy (32 at.% Ni) by induction heating, followed by chemical activation in a NaOH (1.0&#xa0;M) solution at 353&#xa0;K for 72&#xa0;h. The structural integrity and high purity of the samples were verified by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Chemical activation significantly enhances the surface porosity and roughness, leading to a higher density of active catalytic sites. Electrochemical tests conducted in KOH solution revealed that activated electrodes increased the hydrogen evolution reaction (HER) compared to non-activated alloys, along with improved stability and reduced overpotential. These results highlight the combination of induction heating and chemical activation as an efficient and cost-effective approach for developing high-performance Ni–A electrodes for HER, suitable for sustainable green hydrogen production.</p>

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Induction-Heated Ni-Al (Ni32Al68) Alloy Activated in Alkaline Media for Enhanced Hydrogen Evolution Reaction

  • 期刊论文

  • 发表日期：

    2026年5月6日

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  • Sofiane Latreche,
  • Naïma Boutarek-Zaourar,
  • Ismail Bencherifa,
  • Khaled Derkaoui,
  • Faouzi Messaoud,
  • Eric Mossange,
  • Samir Mansour,
  • Mohamed Trari

摘要

This study is devoted to the preparation of a Ni–Al alloy (32 at.% Ni) by induction heating, followed by chemical activation in a NaOH (1.0 M) solution at 353 K for 72 h. The structural integrity and high purity of the samples were verified by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Chemical activation significantly enhances the surface porosity and roughness, leading to a higher density of active catalytic sites. Electrochemical tests conducted in KOH solution revealed that activated electrodes increased the hydrogen evolution reaction (HER) compared to non-activated alloys, along with improved stability and reduced overpotential. These results highlight the combination of induction heating and chemical activation as an efficient and cost-effective approach for developing high-performance Ni–A electrodes for HER, suitable for sustainable green hydrogen production.