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<p>As a clean energy carrier, hydrogen necessitates efficient production via cost-effective, highly active non-noble metal electrocatalysts. Herein, we demonstrate a Zn-doped CoP heterostructure catalyst anchored on MXene-engineered nickel foam (MXene@ZnCoP/NF) through synergistic substrate engineering and compositional modulation. This design achieves exceptional alkaline hydrogen evolution reaction (HER) activity and superior overall water splitting efficiency. In 1.0&#xa0;M KOH electrolyte, the MXene@ZnCoP/NF heterostructure exhibits exceptional HER performance, achieving a low overpotential of 15&#xa0;mV at 10&#xa0;mA&#xa0;cm<sup>−2</sup>, 64&#xa0;mV at 50&#xa0;mA&#xa0;cm<sup>−2</sup>, 214&#xa0;mV at 500&#xa0;mA&#xa0;cm<sup>−2</sup>, and a Tafel slope of 86.0&#xa0;mV dec<sup>−1</sup>, indicative of rapid reaction kinetics. Furthermore, the catalyst demonstrates industrial-grade durability, maintaining stable operation for 65&#xa0;h at 500&#xa0;mA&#xa0;cm<sup>−2</sup> without significant degradation. When integrated into a full-cell electrolyzer with RuO<sub>2</sub>/NF as the anode (RuO<sub>2</sub>/NF ||MXene@ZnCoP/NF), the system requires only 1.53&#xa0;V to deliver a current density of 10&#xa0;mA&#xa0;cm<sup>−2</sup>, surpassing the performance of the noble metal system Pt-C/NF||RuO<sub>2</sub>/NF (1.61&#xa0;V). This highlights its potential as a cost-effective alternative to noble metal-based electrocatalysts for scalable hydrogen production. The enhanced catalytic performance can be primarily attributed to the synergistic interplay of three key factors: the superior conductivity provided by MXene-engineered NF substrates, the Zn doping-induced crystalline-to-amorphous phase reconstruction, and the morphological transformation from micrometer-scale architectures to nanoscale structures. This study proposes an innovative “substrate–structure–composition” synergistic strategy that establishes a new paradigm for designing highly efficient non-noble metal HER electrocatalysts, thereby propelling the scalable industrial implementation of electrocatalytic water splitting for hydrogen production.</p> Graphical abstract <p></p>

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Zn-driven amorphous CoP on MXene-modified Ni foam: phase engineering for efficient hydrogen evolution catalysis

  • 期刊论文

  • 发表日期：

    2025年9月20日

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  • YaXi Zhang,
  • Jin Liang,
  • Li Zhang,
  • FengYuan Zou,
  • YunFeng Li,
  • ZiQuan Zeng,
  • Tian Lei,
  • Guang Yang

摘要

As a clean energy carrier, hydrogen necessitates efficient production via cost-effective, highly active non-noble metal electrocatalysts. Herein, we demonstrate a Zn-doped CoP heterostructure catalyst anchored on MXene-engineered nickel foam (MXene@ZnCoP/NF) through synergistic substrate engineering and compositional modulation. This design achieves exceptional alkaline hydrogen evolution reaction (HER) activity and superior overall water splitting efficiency. In 1.0 M KOH electrolyte, the MXene@ZnCoP/NF heterostructure exhibits exceptional HER performance, achieving a low overpotential of 15 mV at 10 mA cm−2, 64 mV at 50 mA cm−2, 214 mV at 500 mA cm−2, and a Tafel slope of 86.0 mV dec−1, indicative of rapid reaction kinetics. Furthermore, the catalyst demonstrates industrial-grade durability, maintaining stable operation for 65 h at 500 mA cm−2 without significant degradation. When integrated into a full-cell electrolyzer with RuO2/NF as the anode (RuO2/NF ||MXene@ZnCoP/NF), the system requires only 1.53 V to deliver a current density of 10 mA cm−2, surpassing the performance of the noble metal system Pt-C/NF||RuO2/NF (1.61 V). This highlights its potential as a cost-effective alternative to noble metal-based electrocatalysts for scalable hydrogen production. The enhanced catalytic performance can be primarily attributed to the synergistic interplay of three key factors: the superior conductivity provided by MXene-engineered NF substrates, the Zn doping-induced crystalline-to-amorphous phase reconstruction, and the morphological transformation from micrometer-scale architectures to nanoscale structures. This study proposes an innovative “substrate–structure–composition” synergistic strategy that establishes a new paradigm for designing highly efficient non-noble metal HER electrocatalysts, thereby propelling the scalable industrial implementation of electrocatalytic water splitting for hydrogen production.

Graphical abstract