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<p>Developing highly active and cost-effective catalysts for the hydrogen evolution reaction (HER) is crucial for alkaline water electrolysis, but it remains a significant challenge. Herein, nickel (Ni) nanoparticles composite partially confined in molybdenum dioxide (MoO<sub>2</sub>) lattices was developed via a facile strong metal–support interaction (SMSI) tuning strategy. Experimental analyses revealed that the regulation of the electronic structure of Ni@MoO<sub>2</sub> by SMSI significantly alleviated the work function of Ni@MoO<sub>2</sub>, accelerating electron transfer and optimizing adsorption of hydrogen intermediates, thereby boosting the HER activity. The optimized Ni@MoO<sub>2</sub> catalyst exhibited an overpotential of only 18 and 30&#xa0;mV to reach a current density of 10&#xa0;mA&#xa0;cm<sup>−2</sup>, in alkaline freshwater and seawater, respectively, surpassing the commercial Pt/C catalysts. A two-electrode system with Ni@MoO<sub>2</sub> as a cathode required a voltage of 1.46&#xa0;V to attain the current density of 10&#xa0;mA&#xa0;cm<sup>−2</sup>, with no performance degradation after 500&#xa0;h. This two-electrode configuration exhibited a solar-to-hydrogen conversion efficiency of up to 20.10% when used in constructing a solar-powered water electrolysis electrolyzer. This study provides a promising strategy for designing stable and efficient catalysts for industrial hydrogen production.</p> Graphical abstract <p></p>

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Engineering the strong metal–support interaction of Ni nanoparticles and MoO2 nanowires for efficient hydrogen evolution reaction

  • 期刊论文

  • 发表日期：

    2025年9月25日

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  • Jun-Lin Yan,
  • De-Li Tian,
  • Ling-Feng Yang,
  • Min Xi,
  • You-Yu Long,
  • Zi-Tao Ni,
  • Hua Zhang,
  • An-Ran Chen

摘要

Developing highly active and cost-effective catalysts for the hydrogen evolution reaction (HER) is crucial for alkaline water electrolysis, but it remains a significant challenge. Herein, nickel (Ni) nanoparticles composite partially confined in molybdenum dioxide (MoO2) lattices was developed via a facile strong metal–support interaction (SMSI) tuning strategy. Experimental analyses revealed that the regulation of the electronic structure of Ni@MoO2 by SMSI significantly alleviated the work function of Ni@MoO2, accelerating electron transfer and optimizing adsorption of hydrogen intermediates, thereby boosting the HER activity. The optimized Ni@MoO2 catalyst exhibited an overpotential of only 18 and 30 mV to reach a current density of 10 mA cm−2, in alkaline freshwater and seawater, respectively, surpassing the commercial Pt/C catalysts. A two-electrode system with Ni@MoO2 as a cathode required a voltage of 1.46 V to attain the current density of 10 mA cm−2, with no performance degradation after 500 h. This two-electrode configuration exhibited a solar-to-hydrogen conversion efficiency of up to 20.10% when used in constructing a solar-powered water electrolysis electrolyzer. This study provides a promising strategy for designing stable and efficient catalysts for industrial hydrogen production.

Graphical abstract