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<p>The development of efficient Metal-Nitrogen-Carbon (M-N-C) electrocatalysts is typically hindered by complex synthesis procedures and high-temperature treatments that often lead to active site aggregation. Herein, we report a facile, room-temperature plasma-driven strategy to engineer a high-performance Co<sub>3</sub>O<sub>4</sub>@GR-N composite, effectively circumventing these limitations. Unlike conventional thermal methods, this strategy utilizes a synergistic N<sub>2</sub>/H<sub>2</sub> plasma atmosphere to simultaneously achieve high-level N-doping of the graphene support and targeted enrichment of oxygen vacancies (O<sub>Vs</sub>) in Co<sub>3</sub>O<sub>4</sub>. This dual-optimization creates a robust Co-N-C interface that electronically modulates the active sites while maximizing their exposure. Consequently, the optimized catalyst exhibits significantly enhanced Oxygen Evolution Reaction (OER) performance in alkaline media, delivering a current density of 10&#xa0;mA cm<sup>− 2</sup> at a low overpotential of 325 mV, significantly outperforming its thermally annealed counterparts. This work establishes the plasma strategy as a powerful, generalizable pathway for the precise defect engineering of advanced electrocatalysts without compromising structural integrity.</p>

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Synergistic N-doping and oxygen vacancy enrichment in Co3O4@GR-N via plasma treatment for efficient oxygen evolution

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • Yao Xiang

摘要

The development of efficient Metal-Nitrogen-Carbon (M-N-C) electrocatalysts is typically hindered by complex synthesis procedures and high-temperature treatments that often lead to active site aggregation. Herein, we report a facile, room-temperature plasma-driven strategy to engineer a high-performance Co3O4@GR-N composite, effectively circumventing these limitations. Unlike conventional thermal methods, this strategy utilizes a synergistic N2/H2 plasma atmosphere to simultaneously achieve high-level N-doping of the graphene support and targeted enrichment of oxygen vacancies (OVs) in Co3O4. This dual-optimization creates a robust Co-N-C interface that electronically modulates the active sites while maximizing their exposure. Consequently, the optimized catalyst exhibits significantly enhanced Oxygen Evolution Reaction (OER) performance in alkaline media, delivering a current density of 10 mA cm− 2 at a low overpotential of 325 mV, significantly outperforming its thermally annealed counterparts. This work establishes the plasma strategy as a powerful, generalizable pathway for the precise defect engineering of advanced electrocatalysts without compromising structural integrity.