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<p>The development of efficient, stable, and low-cost electrocatalysts is essential for enhancing hydrogen production through water electrolysis in the context of the global energy transition. In this study, a porous heterostructured catalyst composed of carbon-doped iron-cobalt phosphide (C-Fe<sub>2</sub>P/CoP/NF) was successfully synthesized on nickel foam. This was accomplished through the hydrothermal deposition of an iron-cobalt layered double hydroxide (LDH) precursor, followed by the in-situ growth of a metal-organic framework (MOF) and subsequent vapor-phase phosphidation. Systematic characterization indicated that the material features a rich mesoporous structure, a high specific surface area of 84.578&#xa0;m<sup>2</sup> g<sup>− 1</sup>, and intimate heterointerfaces between Fe<sub>2</sub>P and CoP. Carbon doping not only improved electronic conductivity but also optimized the electronic structure of active sites through interfacial electron coupling. Electrochemical tests revealed that C-Fe<sub>2</sub>P/CoP/NF requires an overpotential of merely 172 mV to achieve a current density of 10&#xa0;mA cm<sup>− 2</sup> in 1.0&#xa0;M KOH, with a Tafel slope of 33.17 mV dec<sup>− 1</sup>. Furthermore, the catalyst demonstrated excellent cycling stability, exhibiting no significant current decay over 40&#xa0;h. This study offers an effective strategy for material construction and establishes a theoretical foundation for designing high-performance non-precious metal-based OER electrocatalysts.</p> Graphical Abstract <p></p>

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Carbon-Doped Fe2P/CoP Heterostructure on Nickel Foam via MOF-Derived Phosphidation for Efficient Oxygen Evolution Reaction

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Haixiang Wang,
  • Haibo Wang,
  • Qingzhu Sun,
  • Qirong Li,
  • Xiangdong Liu,
  • Lei Xing,
  • Sijia Guo,
  • Yongchang Zhu,
  • Zhixin Wan,
  • Xiaorang Guo,
  • Tao Tang

摘要

The development of efficient, stable, and low-cost electrocatalysts is essential for enhancing hydrogen production through water electrolysis in the context of the global energy transition. In this study, a porous heterostructured catalyst composed of carbon-doped iron-cobalt phosphide (C-Fe2P/CoP/NF) was successfully synthesized on nickel foam. This was accomplished through the hydrothermal deposition of an iron-cobalt layered double hydroxide (LDH) precursor, followed by the in-situ growth of a metal-organic framework (MOF) and subsequent vapor-phase phosphidation. Systematic characterization indicated that the material features a rich mesoporous structure, a high specific surface area of 84.578 m2 g− 1, and intimate heterointerfaces between Fe2P and CoP. Carbon doping not only improved electronic conductivity but also optimized the electronic structure of active sites through interfacial electron coupling. Electrochemical tests revealed that C-Fe2P/CoP/NF requires an overpotential of merely 172 mV to achieve a current density of 10 mA cm− 2 in 1.0 M KOH, with a Tafel slope of 33.17 mV dec− 1. Furthermore, the catalyst demonstrated excellent cycling stability, exhibiting no significant current decay over 40 h. This study offers an effective strategy for material construction and establishes a theoretical foundation for designing high-performance non-precious metal-based OER electrocatalysts.

Graphical Abstract