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

Liangbin Liu, Lujie Jin, Renjie Ren, Wei Yan, Nan Fang, Yujin Ji, Youyong Li, Lin Zhuang, Qingyu Kong, Zhiwei Hu, Qi Shao () and Xiaoqing Huang ()
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Liangbin Liu: Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM)
Lujie Jin: Soochow University
Renjie Ren: Wuhan University
Wei Yan: Xiamen University
Nan Fang: Xiamen University
Yujin Ji: Soochow University
Youyong Li: Soochow University
Lin Zhuang: Wuhan University
Qingyu Kong: St-Aubin
Zhiwei Hu: Nothnitzer Strasse 40
Qi Shao: Soochow University
Xiaoqing Huang: Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM)

Nature Communications, 2025, vol. 16, issue 1, 1-11

Abstract: Abstract 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.

Date: 2025
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DOI: 10.1038/s41467-025-63998-8

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