Embedding oxophilic rare-earth single atom in platinum nanoclusters for efficient hydrogen electro-oxidation

Xiaoning Wang, Yanfu Tong, Wenting Feng, Pengyun Liu, Xuejin Li, Yongpeng Cui, Tonghui Cai, Lianming Zhao, Qingzhong Xue, Zifeng Yan, Xun Yuan () and Wei Xing ()
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Xiaoning Wang: China University of Petroleum
Yanfu Tong: China University of Petroleum
Wenting Feng: China University of Petroleum
Pengyun Liu: China University of Petroleum
Xuejin Li: China University of Petroleum
Yongpeng Cui: China University of Petroleum
Tonghui Cai: China University of Petroleum
Lianming Zhao: China University of Petroleum
Qingzhong Xue: China University of Petroleum
Zifeng Yan: China University of Petroleum
Xun Yuan: Qingdao University of Science and Technology
Wei Xing: China University of Petroleum

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Designing Pt-based electrocatalysts with high catalytic activity and CO tolerance is challenging but extremely desirable for alkaline hydrogen oxidation reaction. Herein we report the design of a series of single-atom lanthanide (La, Ce, Pr, Nd, and Lu)-embedded ultrasmall Pt nanoclusters for efficient alkaline hydrogen electro-oxidation catalysis based on vapor filling and spatially confined reduction/growth of metal species. Mechanism studies reveal that oxophilic single-atom lanthanide species in Pt nanoclusters can serve as the Lewis acid site for selective OH- adsorption and regulate the binding strength of intermediates on Pt sites, which promotes the kinetics of hydrogen oxidation and CO oxidation by accelerating the combination of OH− and *H/*CO in kinetics and thermodynamics, endowing the electrocatalyst with up to 14.3-times higher mass activity than commercial Pt/C and enhanced CO tolerance. This work may shed light on the design of metal nanocluster-based electrocatalysts for energy conversion.

Date: 2023
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DOI: 10.1038/s41467-023-39475-5

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