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<p>Atomically dispersed catalysts, characterized by their high atom utilization efficiency and distinct catalytic activity, exhibit advantages in reducing fuel cell costs. Herein, we synthesized Co/N/C atomic catalysts by acid leaching of CoO/N/C prepared through carbothermal shock. The resulting Co/N/C-130 demonstrates outstanding performance for the oxygen reduction reaction (ORR) in alkaline media. It displays a half-wave potential (<i>E</i><sub><i>1/2</i></sub>) of 0.82&#xa0;V and a Tafel slope of 47.1&#xa0;mV&#xa0;dec<sup>−1</sup>. Furthermore, it exhibits excellent stability with a positive<i> E</i><sub><i>1/2</i></sub> shift of 6&#xa0;mV after 40,000 cycles. When applied as a cathode catalyst in a direct borohydride fuel cell (DBFC), Co/N/C-130 achieves a maximum power density of 396&#xa0;mW&#xa0;cm<sup>−2</sup> at 60&#xa0;°C. Long-term durability test at 50&#xa0;mA&#xa0;cm<sup>−2</sup> reveals a power retention of 90.8% after 24&#xa0;h and 76.3% after 50&#xa0;h. These results demonstrate that Co/N/C-130 atomic catalyst is a highly efficient and durable non-precious metal catalyst for ORR.</p> Graphical abstract <p></p>

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Highly durable atomically dispersed Co/N/C electrocatalysts for the oxygen reduction reaction

  • 期刊论文

  • 发表日期：

    2026年3月11日

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  • Zhiwei Zhang,
  • Yuhang Nie,
  • Lianke Zhang,
  • Zhiqiang Wei,
  • Dandan Li,
  • Haiying Qin,
  • Hualiang Ni,
  • Yangyang Li,
  • Junjing He

摘要

Atomically dispersed catalysts, characterized by their high atom utilization efficiency and distinct catalytic activity, exhibit advantages in reducing fuel cell costs. Herein, we synthesized Co/N/C atomic catalysts by acid leaching of CoO/N/C prepared through carbothermal shock. The resulting Co/N/C-130 demonstrates outstanding performance for the oxygen reduction reaction (ORR) in alkaline media. It displays a half-wave potential (E1/2) of 0.82 V and a Tafel slope of 47.1 mV dec−1. Furthermore, it exhibits excellent stability with a positive E1/2 shift of 6 mV after 40,000 cycles. When applied as a cathode catalyst in a direct borohydride fuel cell (DBFC), Co/N/C-130 achieves a maximum power density of 396 mW cm−2 at 60 °C. Long-term durability test at 50 mA cm−2 reveals a power retention of 90.8% after 24 h and 76.3% after 50 h. These results demonstrate that Co/N/C-130 atomic catalyst is a highly efficient and durable non-precious metal catalyst for ORR.

Graphical abstract