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<p>The development of cost-effective electrocatalysts for the oxygen evolution reaction (OER) is crucial for sustainable hydrogen production, but there are still some challenges in optimizing activity and stability. Herein, we fabricate a sulfur-doped iron-nickel catalyst loaded on Nickel foam (FeNiS/NF) through a NaBH₄ reduction-hydrothermal sulfidation strategy. Due to the layered sheet-like structure exposing abundant active sites, as well as the synergistic effect of Fe-Ni bimetallic and S loading, the FeNiS/NF catalyst exhibits excellent OER performance. In 1&#xa0;M KOH, FeNiS/NF achieves a low overpotential of 317 mV at 100&#xa0;mA cm⁻², a Tafel slope of 75 mV dec⁻¹, and remained stable within 150&#xa0;h at a current density of 100&#xa0;mA cm⁻². The work provides a cost-effective alternative to noble-metal catalysts for the OER.</p>

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Sulfur-doping iron-nickel catalysts on nickel foam for enhanced oxygen evolution reaction

  • 期刊论文

  • 发表日期：

    2026年7月14日

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  • Yuanxin Li,
  • Aixin Fan,
  • Yajia Gu,
  • Yuxiao Chen,
  • XiaoJie Zhao,
  • Fucai Dai,
  • Congli Qin

摘要

The development of cost-effective electrocatalysts for the oxygen evolution reaction (OER) is crucial for sustainable hydrogen production, but there are still some challenges in optimizing activity and stability. Herein, we fabricate a sulfur-doped iron-nickel catalyst loaded on Nickel foam (FeNiS/NF) through a NaBH₄ reduction-hydrothermal sulfidation strategy. Due to the layered sheet-like structure exposing abundant active sites, as well as the synergistic effect of Fe-Ni bimetallic and S loading, the FeNiS/NF catalyst exhibits excellent OER performance. In 1 M KOH, FeNiS/NF achieves a low overpotential of 317 mV at 100 mA cm⁻², a Tafel slope of 75 mV dec⁻¹, and remained stable within 150 h at a current density of 100 mA cm⁻². The work provides a cost-effective alternative to noble-metal catalysts for the OER.