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<p>The development of highly active and CO-tolerant hydrogen oxidation reaction (HOR) electrocatalysts is of great significance for alkaline exchange membrane fuel cells (AEMFCs). Here, the designed atomically Ni anchored Ru/RuO<sub>2</sub> heterostructure nanosheets (Ni<sub>SA</sub>-Ru@RuO<sub>2</sub> NSs/C) exhibit enhanced activity and stability for HOR in alkaline media. The optimized electrocatalyst delivers a high CO-tolerant durability with 92.3% retention in the 1000 ppm CO concentration after 5000 s test. Moreover, the anode catalyst Ni<sub>SA</sub>-Ru@RuO<sub>2</sub> NSs/C assembled AEMFCs output a peak power density (PPD) and specific PPD of 1.76 W cm<sup>−2</sup> and 17.6 W mg<sub>PGM</sub><sup>−1</sup> under the H<sub>2</sub>/O<sub>2</sub> condition and performed a long-term stability with negligible decay for 100 h at 0.5 A cm<sup>−2</sup> for the AEMFCs. The relative mechanism studies reveal that the Ru/RuO<sub>2</sub> heterostructure nanosheet and dispersed Ni single atoms have optimized the *H and *OH adsorption simultaneously and weaken the *CO adsorption. Our work may offer a significant guideline on the rational design of high-performance HOR electrocatalyst for energy-related applications.</p>

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A concurrently optimization of H and OH binding energies in atomically Ni anchored Ru/RuO2 nanosheet driving high CO-tolerant hydrogen oxidation catalysis

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月8日

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  • Liangbin Liu,
  • Lujie Jin,
  • Renjie Ren,
  • Wei Yan,
  • Nan Fang,
  • Yujin Ji,
  • Youyong Li,
  • Lin Zhuang,
  • Qingyu Kong,
  • Zhiwei Hu,
  • Qi Shao,
  • Xiaoqing Huang

摘要

The development of highly active and CO-tolerant hydrogen oxidation reaction (HOR) electrocatalysts is of great significance for alkaline exchange membrane fuel cells (AEMFCs). Here, the designed atomically Ni anchored Ru/RuO2 heterostructure nanosheets (NiSA-Ru@RuO2 NSs/C) exhibit enhanced activity and stability for HOR in alkaline media. The optimized electrocatalyst delivers a high CO-tolerant durability with 92.3% retention in the 1000 ppm CO concentration after 5000 s test. Moreover, the anode catalyst NiSA-Ru@RuO2 NSs/C assembled AEMFCs output a peak power density (PPD) and specific PPD of 1.76 W cm−2 and 17.6 W mgPGM−1 under the H2/O2 condition and performed a long-term stability with negligible decay for 100 h at 0.5 A cm−2 for the AEMFCs. The relative mechanism studies reveal that the Ru/RuO2 heterostructure nanosheet and dispersed Ni single atoms have optimized the *H and *OH adsorption simultaneously and weaken the *CO adsorption. Our work may offer a significant guideline on the rational design of high-performance HOR electrocatalyst for energy-related applications.