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<p>In this work, the composites of CoSe<sub>2</sub> coating on N-doped porous carbon material (denoted as NPC) have been prepared by sol-gel method, and the loading amount was optimized. The results indicate that the activities of the composite catalysts have been greatly improved compared to each component thanks to the improvement of conductivity and dispersibility. Especially, the optimized catalyst CoSe<sub>2</sub>/NPC-75 exhibited excellent HER catalytic performance under alkaline conditions, achieving a current density of 10 mA/cm<sup>2</sup> with only 74 mV of overpotential. This performance can be compared to precious Pt/C (20%) catalyst and is also superior to many highly-active analogous catalysts reported. The exceptional catalytic performance is attributed to the synergistic effects between CoSe<sub>2</sub> and NPC, and the electronic structure modifications induced by the N-doped carbon support. These innovations improve catalytic activity, durability, and charge transfer kinetics. This study highlights the potential of combining sol-gel synthesis, electrocatalysis, and nanomaterials engineering to develop cost-effective, high-performance electrocatalysts for hydrogen production.</p> Graphical Abstract <p></p>

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Composite materials from N-doped porous carbon and CoSe2 as excellent electrocatalysts for the hydrogen evolution reaction

  • 期刊论文

  • 发表日期：

    2025年4月8日

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  • Xinsheng Lu,
  • Xingyu Xu,
  • Qirui Kang,
  • Rong Li,
  • Ruhu Gou,
  • Jinning Dang,
  • Boqu Liu,
  • Jinhui Tong

摘要

In this work, the composites of CoSe2 coating on N-doped porous carbon material (denoted as NPC) have been prepared by sol-gel method, and the loading amount was optimized. The results indicate that the activities of the composite catalysts have been greatly improved compared to each component thanks to the improvement of conductivity and dispersibility. Especially, the optimized catalyst CoSe2/NPC-75 exhibited excellent HER catalytic performance under alkaline conditions, achieving a current density of 10 mA/cm2 with only 74 mV of overpotential. This performance can be compared to precious Pt/C (20%) catalyst and is also superior to many highly-active analogous catalysts reported. The exceptional catalytic performance is attributed to the synergistic effects between CoSe2 and NPC, and the electronic structure modifications induced by the N-doped carbon support. These innovations improve catalytic activity, durability, and charge transfer kinetics. This study highlights the potential of combining sol-gel synthesis, electrocatalysis, and nanomaterials engineering to develop cost-effective, high-performance electrocatalysts for hydrogen production.

Graphical Abstract