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<p>The development of low-cost, high-activity non-precious metal catalysts for the oxygen reduction reaction (ORR) is of great significance in promoting the large-scale commercialization of fuel cells (FCs). This study successfully prepared nitrogen-coordinated Cu/Fe bimetallic-doped porous carbon catalysts (Cu/FeNC), which enhance the catalytic activity and stability of the ORR by introducing Cu to optimize the electronic structure of the active site of Fe. Additionally, the influence of Cu/Fe ratio and calcination temperature on the physicochemical properties and performance of the catalysts was investigated. The optimized Cu/FeNC catalysts exhibited a large specific surface area (567.8 m<sup>2</sup>·g<sup>− 1</sup>) and an abundant mesoporous structure. In alkaline media, the Cu/FeNC demonstrated excellent ORR catalytic performance, characterized by a high onset potential of 0.98&#xa0;V, a half-wave potential of 0.86&#xa0;V, and a limiting current density of 5.2&#xa0;mA·cm<sup>− 2</sup>. Compared to commercial Pt/C, Cu/FeNC exhibited superior methanol tolerance and better long-term stability, retaining 91.2% of its activity after 6&#xa0;h. This study provides a novel approach for synthesizing high-performance and low-cost bimetallic catalysts.</p> Graphical Abstract <p></p>

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ZIFs-Derived Bimetallic Synergistic Cu/FeNC Catalyst for Improving ORR Performance

  • 期刊论文

  • 发表日期：

    2025年4月17日

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  • Xinfu He,
  • Di Gao,
  • Hongju Wu,
  • Minlong Guan,
  • Chuhan Wang,
  • Jianglong Zhou,
  • Chi Ma,
  • Yating Zhang,
  • Anning Zhou

摘要

The development of low-cost, high-activity non-precious metal catalysts for the oxygen reduction reaction (ORR) is of great significance in promoting the large-scale commercialization of fuel cells (FCs). This study successfully prepared nitrogen-coordinated Cu/Fe bimetallic-doped porous carbon catalysts (Cu/FeNC), which enhance the catalytic activity and stability of the ORR by introducing Cu to optimize the electronic structure of the active site of Fe. Additionally, the influence of Cu/Fe ratio and calcination temperature on the physicochemical properties and performance of the catalysts was investigated. The optimized Cu/FeNC catalysts exhibited a large specific surface area (567.8 m2·g− 1) and an abundant mesoporous structure. In alkaline media, the Cu/FeNC demonstrated excellent ORR catalytic performance, characterized by a high onset potential of 0.98 V, a half-wave potential of 0.86 V, and a limiting current density of 5.2 mA·cm− 2. Compared to commercial Pt/C, Cu/FeNC exhibited superior methanol tolerance and better long-term stability, retaining 91.2% of its activity after 6 h. This study provides a novel approach for synthesizing high-performance and low-cost bimetallic catalysts.

Graphical Abstract