Modulating Pt-O-Pt atomic clusters with isolated cobalt atoms for enhanced hydrogen evolution catalysis

Yufei Zhao, Priyank V. Kumar, Xin Tan, Xinxin Lu, Xiaofeng Zhu, Junjie Jiang, Jian Pan, Shibo Xi, Hui Ying Yang, Zhipeng Ma, Tao Wan, Dewei Chu, Wenjie Jiang, Sean C. Smith, Rose Amal, Zhaojun Han () and Xunyu Lu ()
Additional contact information
Yufei Zhao: The University of New South Wales
Priyank V. Kumar: The University of New South Wales
Xin Tan: Australian National University
Xinxin Lu: The Chinese University of Hong Kong (Shenzhen)
Xiaofeng Zhu: The University of New South Wales
Junjie Jiang: The University of New South Wales
Jian Pan: The University of New South Wales
Shibo Xi: Technology and Research (A*STAR)
Hui Ying Yang: Singapore University of Technology and Design
Zhipeng Ma: The University of New South Wales
Tao Wan: The University of New South Wales
Dewei Chu: The University of New South Wales
Wenjie Jiang: The University of New South Wales
Sean C. Smith: Australian National University
Rose Amal: The University of New South Wales
Zhaojun Han: The University of New South Wales
Xunyu Lu: The University of New South Wales

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract Platinum is the most efficient catalyst for hydrogen evolution reaction in acidic conditions, but its widespread use has been impeded by scarcity and high cost. Herein, Pt atomic clusters (Pt ACs) containing Pt-O-Pt units were prepared using Co/N co-doped carbon (CoNC) as support. Pt ACs are anchored to single Co atoms on CoNC by forming strong interactions. Pt-ACs/CoNC exhibits only 24 mV overpotential at 10 mA cm−2 and a high mass activity of 28.6 A mg−1 at 50 mV, which is more than 6 times higher than commercial Pt/C with any Pt loadings. Spectroscopic measurements and computational modeling reveal the enhanced hydrogen generation activity attributes to the charge redistribution between Pt and O atoms in Pt-O-Pt units, making Pt atoms the main active sites and O linkers the assistants, thus optimizing the proton adsorption and hydrogen desorption. This work opens an avenue to fabricate noble-metal-based ACs stabilized by single-atom catalysts with desired properties for electrocatalysis.

Date: 2022
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DOI: 10.1038/s41467-022-30155-4

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