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<p>This study introduces an electrocatalyst composed of nickel-molybdenum-phosphide (NiMoP) supported on nickel foam (NiF), which has been synthesized using a straightforward two-step electrodeposition method intended for enhancing the efficiency of the hydrogen evolution reaction (HER) in alkaline environments. The addition of Mo and P, in contrast to traditional Ni-based catalysts, creates a synergistic electronic effect that considerably improves HER kinetics. The enhanced NiMoP/NiF catalyst demonstrates an impressively low overpotential of 171 mV at 10&#xa0;mA cm⁻² and 376 mV at 100&#xa0;mA․cm⁻², surpassing the performance of Ni/NiF (η<sub>10</sub> = 229 mV) and NiMo/NiF (η<sub>10</sub> = 181 mV). In comparison to current NiMoP systems, our catalyst exhibits superior catalytic activity, stability, and charge transfer efficiency. The electrochemical analysis indicates a Tafel slope of 119.98 mV․dec⁻¹, which supports a Volmer-controlled hydrogen evolution reaction mechanism characterized by enhanced water dissociation. The structural and compositional analysis demonstrates that Mo improves the electronic structure of Ni, whereas P increases water affinity and electrochemical surface area (C<sub>dl</sub> = 3.18 mF·cm⁻²), which is almost four times higher than that of pristine NiF. The catalyst exhibits remarkable stability throughout 2000 cycles and shows reliable performance in multi-step chronopotentiometry evaluations. This study presents an economical, long-lasting, and scalable electrocatalyst for hydrogen evolution reaction, serving as a viable substitute for noble-metal-based systems in the pursuit of sustainable hydrogen production.</p> Graphical abstract <p></p>

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Effective Hydrogen Evolution of Nickel–Molybdenum–Phosphide Electrodeposited Nickel Foam Electrode

  • 期刊论文

  • 发表日期：

    2025年3月12日

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  • Yi Xiong,
  • Wei Zeng,
  • Azmain Akib Akash,
  • Yun Tang,
  • Dong Wei,
  • Huihong Liu,
  • Sakil Mahmud

摘要

This study introduces an electrocatalyst composed of nickel-molybdenum-phosphide (NiMoP) supported on nickel foam (NiF), which has been synthesized using a straightforward two-step electrodeposition method intended for enhancing the efficiency of the hydrogen evolution reaction (HER) in alkaline environments. The addition of Mo and P, in contrast to traditional Ni-based catalysts, creates a synergistic electronic effect that considerably improves HER kinetics. The enhanced NiMoP/NiF catalyst demonstrates an impressively low overpotential of 171 mV at 10 mA cm⁻² and 376 mV at 100 mA․cm⁻², surpassing the performance of Ni/NiF (η10 = 229 mV) and NiMo/NiF (η10 = 181 mV). In comparison to current NiMoP systems, our catalyst exhibits superior catalytic activity, stability, and charge transfer efficiency. The electrochemical analysis indicates a Tafel slope of 119.98 mV․dec⁻¹, which supports a Volmer-controlled hydrogen evolution reaction mechanism characterized by enhanced water dissociation. The structural and compositional analysis demonstrates that Mo improves the electronic structure of Ni, whereas P increases water affinity and electrochemical surface area (Cdl = 3.18 mF·cm⁻²), which is almost four times higher than that of pristine NiF. The catalyst exhibits remarkable stability throughout 2000 cycles and shows reliable performance in multi-step chronopotentiometry evaluations. This study presents an economical, long-lasting, and scalable electrocatalyst for hydrogen evolution reaction, serving as a viable substitute for noble-metal-based systems in the pursuit of sustainable hydrogen production.

Graphical abstract