A concurrently optimization of H and OH binding energies in atomically Ni anchored Ru/RuO<sub>2</sub> nanosheet driving high CO-tolerant hydrogen oxidation catalysis.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41062495.
- Also identified by DOI 10.1038/s41467-025-63998-8 and PMC identifier 12508160.
- Licence recorded as CC BY-NC-ND.
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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/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.