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<p>Modifying the intrinsic activity and conductivity of electrocatalysts represents a pivotal approach for achieving outstanding performance in the hydrogen evolution reaction (HER). In this study, we focused on the rational fabrication of vanadium (V)-doped nickel cobalt phosphide on Ni foam (VNiCoP/NF) employing a wet chemical synthesis followed by a controlled NaH<sub>2</sub>PO<sub>2</sub>-assisted solid-gas phosphidation process. Electrochemical measurements conducted in an alkaline electrolyte demonstrated the significantly enhanced electrocatalytic activity of the synthesized VNiCoP/NF nanoparticles for HER, achieving overpotentials of 141, 137, and 79 mV at current densities of 200, 100, and 10&#xa0;mA cm<sup>− 2</sup>, respectively. The exceptional electrocatalytic performance of the VNiCoP/NF catalyst can be ascribed to the enhanced intrinsic activity and conductivity resulting from the phosphating process and the incorporation of vanadium, as well as the synergism between the V and NiCoP active sites. Prominently, the VNiCoP/NF catalyst demonstrated remarkable long-term stability for 50&#xa0;h at 100&#xa0;mA cm<sup>− 2</sup>. Consequently, the introduction of metal doping into phosphides based on transition metals represents a highly promising strategy for developing exceptionally efficient HER electrocatalysts for green hydrogen production.</p>

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Vanadium-Doped NiCoP Nanosheets for Enhanced Hydrogen Evolution Reaction in Alkaline Media

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Mani Ram Kandel,
  • Purna Prasad Dhakal,
  • Chandan Chandru Gudal,
  • Jay Ram Thapa,
  • Keshav Raj Chapagain,
  • Indra Bahadur Bhandari,
  • Kisan Chhetri,
  • Chan-Hwa Chung

摘要

Modifying the intrinsic activity and conductivity of electrocatalysts represents a pivotal approach for achieving outstanding performance in the hydrogen evolution reaction (HER). In this study, we focused on the rational fabrication of vanadium (V)-doped nickel cobalt phosphide on Ni foam (VNiCoP/NF) employing a wet chemical synthesis followed by a controlled NaH2PO2-assisted solid-gas phosphidation process. Electrochemical measurements conducted in an alkaline electrolyte demonstrated the significantly enhanced electrocatalytic activity of the synthesized VNiCoP/NF nanoparticles for HER, achieving overpotentials of 141, 137, and 79 mV at current densities of 200, 100, and 10 mA cm− 2, respectively. The exceptional electrocatalytic performance of the VNiCoP/NF catalyst can be ascribed to the enhanced intrinsic activity and conductivity resulting from the phosphating process and the incorporation of vanadium, as well as the synergism between the V and NiCoP active sites. Prominently, the VNiCoP/NF catalyst demonstrated remarkable long-term stability for 50 h at 100 mA cm− 2. Consequently, the introduction of metal doping into phosphides based on transition metals represents a highly promising strategy for developing exceptionally efficient HER electrocatalysts for green hydrogen production.