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<p>CoCo-Prussian blue analogue nanocubes were firstly synthesized via a co-precipitation method and subsequently converted into CoSe<sub>2</sub> nanocubes through a high-temperature selenization. The core–shell-structured CoSe<sub>2</sub>@MoS<sub>2</sub> electrocatalyst was then fabricated via a hydrothermal process. The resulting material exhibits outstanding hydrogen evolution reaction performances in both acidic and alkaline electrolytes, achieving overpotentials of 229 and 247&#xa0;mV at the current density of 10&#xa0;mA cm<sup>−2</sup>, respectively, with the corresponding Tafel slopes of 79 and 115&#xa0;mV dec<sup>−1</sup>. Notably, the CoSe<sub>2</sub>@MoS<sub>2</sub> catalyst maintains a high catalytic activity after extended cycles. The enhanced catalytic activity and durability are primarily ascribed to the core–shell architecture, wherein MoS<sub>2</sub> nanosheets uniformly anchored on the surface of CoSe<sub>2</sub> nanocubes effectively suppress the self-agglomeration of MoS<sub>2</sub> nanosheets, thus providing abundant active sites.</p>

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CoSe2@MoS2 core–shell nanocubes as highly efficient electrocatalysts for acidic and alkaline hydrogen evolution

  • 期刊论文

  • 发表日期：

    2026年5月2日

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  • Jun-Hui Cao,
  • Guang-Long Wang,
  • Shu-Sen Hou,
  • Hu Zhou,
  • Chun Ouyang,
  • Long-Feng Lin,
  • Yan-Xin Qiao,
  • Yi-Shan Jiang,
  • Qi-Chao Zhang

摘要

CoCo-Prussian blue analogue nanocubes were firstly synthesized via a co-precipitation method and subsequently converted into CoSe2 nanocubes through a high-temperature selenization. The core–shell-structured CoSe2@MoS2 electrocatalyst was then fabricated via a hydrothermal process. The resulting material exhibits outstanding hydrogen evolution reaction performances in both acidic and alkaline electrolytes, achieving overpotentials of 229 and 247 mV at the current density of 10 mA cm−2, respectively, with the corresponding Tafel slopes of 79 and 115 mV dec−1. Notably, the CoSe2@MoS2 catalyst maintains a high catalytic activity after extended cycles. The enhanced catalytic activity and durability are primarily ascribed to the core–shell architecture, wherein MoS2 nanosheets uniformly anchored on the surface of CoSe2 nanocubes effectively suppress the self-agglomeration of MoS2 nanosheets, thus providing abundant active sites.