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<p>Development of active MoS<sub>2</sub> layers with favorable structure is extensively pursued for sustainable H<sub>2</sub> production via water electrolysis in alkaline media but remains a challenge. Herein, Ni and Fe co-doping is applied to boost the electrocatalytic activity of MoS<sub>2</sub> via an instant molten alkali method, followed by conventional hydrothermal procedure. Microstructural analyses demonstrate that MoS<sub>2</sub> layers with doping Ni and Fe heteroatoms introduce abundant catalytically active sites and enhance the conductivity of the hybrid. Therefore, the optimized Ni:Fe (3:1)-MoS<sub>2</sub> layers displays superior alkaline electrocatalytic activities, achieving impressive overpotentials of 115&#xa0;mV at 10&#xa0;mA&#xa0;cm<sup>−2</sup> for hydrogen evolution reaction (HER) and 270&#xa0;mV at 20&#xa0;mA&#xa0;cm<sup>−2</sup> for oxygen evolution reaction (OER). In addition, the durability test over 30&#xa0;h reinforced the application potential of the modified electrodes. This study provides a new strategy into optimizing MoS<sub>2</sub>-based catalysts for water electrolysis.</p> Graphical abstract <p>Ni and Fe co-doped MoS<sub>2</sub> active layers are prepared via instant molten alkali and hydrothermal procedure. The co-doping of Ni and Fe heteroatoms introduced abundant accessible active sites and enhanced the electrical conductivity of MoS<sub>2</sub> layers. As expected, superior catalytic activity for HER (<i>η</i><sub>10</sub> = 115&#xa0;mV) and OER (<i>η</i><sub>20</sub> = 270&#xa0;mV) are achieved. The stability and durability are greatly enhanced even under harsh electrochemical conditions.</p> <p></p>

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Active MoS2 layers with co-doping of nickel and iron heteroatoms for alkaline water electrolysis

  • 期刊论文

  • 发表日期：

    2026年5月7日

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  • Chaolin Miao,
  • Yuxin Miao,
  • Liangyu Tong,
  • Yifan Su,
  • Hongxun Yang,
  • Ruimin Xing

摘要

Development of active MoS2 layers with favorable structure is extensively pursued for sustainable H2 production via water electrolysis in alkaline media but remains a challenge. Herein, Ni and Fe co-doping is applied to boost the electrocatalytic activity of MoS2 via an instant molten alkali method, followed by conventional hydrothermal procedure. Microstructural analyses demonstrate that MoS2 layers with doping Ni and Fe heteroatoms introduce abundant catalytically active sites and enhance the conductivity of the hybrid. Therefore, the optimized Ni:Fe (3:1)-MoS2 layers displays superior alkaline electrocatalytic activities, achieving impressive overpotentials of 115 mV at 10 mA cm−2 for hydrogen evolution reaction (HER) and 270 mV at 20 mA cm−2 for oxygen evolution reaction (OER). In addition, the durability test over 30 h reinforced the application potential of the modified electrodes. This study provides a new strategy into optimizing MoS2-based catalysts for water electrolysis.

Graphical abstract

Ni and Fe co-doped MoS2 active layers are prepared via instant molten alkali and hydrothermal procedure. The co-doping of Ni and Fe heteroatoms introduced abundant accessible active sites and enhanced the electrical conductivity of MoS2 layers. As expected, superior catalytic activity for HER (η10 = 115 mV) and OER (η20 = 270 mV) are achieved. The stability and durability are greatly enhanced even under harsh electrochemical conditions.