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<p>The design and fabrication of cost-effective and efficient bifunctional water splitting electrocatalysts is of great significance to the development of clean energy. Herein, we successfully synthesized free-standing MoS₂/NiS heterostructure nanosheet electrocatalyst via templating strategy. Benefiting from the two-dimensional (2D) architecture of MoS<sub>2</sub>/NiS heterostructure, the few-layer structural features of MoS<sub>2</sub>, and synergistic effects between heterogeneous components, the catalyst demonstrated enhanced electrochemical performance for water splitting. The as-obtained MoS<sub>2</sub>/NiS heterostructured catalyst exhibited overpotentials of 206&#xa0;mV at 10&#xa0;mA&#xa0;cm<sup>−2</sup> and 400&#xa0;mV at 100&#xa0;mA&#xa0;cm<sup>−2</sup> for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Notably, when configured as a dual-electrode electrolyzer cell, the MoS<sub>2</sub>/NiS operates a working voltage of 1.59&#xa0;V to achieve a current density of 10&#xa0;mA&#xa0;cm<sup>−2</sup>. This work presents a viable approach for designing high-efficiency bifunctional electrocatalysts.</p>

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MoS₂/NiS heterostructure nanosheets as bifunctional electrocatalysts for efficient water splitting

  • 期刊论文

  • 发表日期：

    2025年7月8日

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  • Congli Qin,
  • Yanhong Lu,
  • Lei Wei,
  • Haoran Xue,
  • Yanan Dang,
  • Aixin Fan

摘要

The design and fabrication of cost-effective and efficient bifunctional water splitting electrocatalysts is of great significance to the development of clean energy. Herein, we successfully synthesized free-standing MoS₂/NiS heterostructure nanosheet electrocatalyst via templating strategy. Benefiting from the two-dimensional (2D) architecture of MoS2/NiS heterostructure, the few-layer structural features of MoS2, and synergistic effects between heterogeneous components, the catalyst demonstrated enhanced electrochemical performance for water splitting. The as-obtained MoS2/NiS heterostructured catalyst exhibited overpotentials of 206 mV at 10 mA cm−2 and 400 mV at 100 mA cm−2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Notably, when configured as a dual-electrode electrolyzer cell, the MoS2/NiS operates a working voltage of 1.59 V to achieve a current density of 10 mA cm−2. This work presents a viable approach for designing high-efficiency bifunctional electrocatalysts.