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Nano Research 2023, 16(2): 2035-2040 https://doi.org/10.1007/s12274-022-4868-3
Research Article | Issue | Published: 22 September 2022

Ultra-stable Pt5La intermetallic compound towards highly efficient oxygen reduction reaction

Show Author's Information Siyuan Zhu1,2,  Liting Yang1,2,  Jingsen Bai1,2,  Yuyi Chu1,2,  Jie Liu1,2,  Zhao Jin1,2,  Changpeng Liu1,2,  Junjie Ge1,2,3( ),  Wei Xing1,2( )
State Key Laboratory of Electroanalytical Chemistry, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
School of Applied Chemistry and Engineering, University of Science and Technology of China, University of Science and Technology of China (USTC), Hefei 230026, China
Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
Keywords:
oxygen reduction reaction, electrocatalysis, intermetallic compound, rare earth metal
Topics:
Oxygen reduction reaction
Cite this article:
Zhu S, Yang L, Bai J, et al. Ultra-stable Pt5La intermetallic compound towards highly efficient oxygen reduction reaction. Nano Research, 2023, 16(2): 2035-2040. https://doi.org/10.1007/s12274-022-4868-3
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Abstract Full text Electronic supplementary material About this article

Designing feasible electrocatalysts towards oxygen reduction reaction (ORR) requires advancement in both activity and stability, where attaining high stability is of extreme importance as the catalysts are expected to work efficiently under frequent start-up/shut down circumstances for at least several thousand hours. Alloying platinum with early transition metals (i.e., Pt–La alloy) is revealed as efficient catalysts construction strategy to potentially satisfy these demands. Here we report a Pt5La intermetallic compound synthesized by a novel and facile strategy. Due to the strong electronic interactions between Pt and La, the resultant Pt5La alloy catalyst exhibits enhanced activity with half wave of 0.92 V and mass activity of 0.49 A·mgPt−1, which strictly follows the 4e transfer pathway. More importantly, the catalyst performs superior stability during 30,000 cycles of accelerated stressed test (AST) with mass activity retention of 93.9%. This study provides new opportunities for future applications of Pt-rare earth metal alloy with excellent electrocatalytic properties.


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Electronic supplementary material
About this article

Ultra-stable Pt5La intermetallic compound towards highly efficient oxygen reduction reaction

Show Author's information Siyuan Zhu1,2, Liting Yang1,2, Jingsen Bai1,2, Yuyi Chu1,2, Jie Liu1,2, Zhao Jin1,2, Changpeng Liu1,2, Junjie Ge1,2,3( ), Wei Xing1,2( )
State Key Laboratory of Electroanalytical Chemistry, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
School of Applied Chemistry and Engineering, University of Science and Technology of China, University of Science and Technology of China (USTC), Hefei 230026, China
Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China

Abstract

Designing feasible electrocatalysts towards oxygen reduction reaction (ORR) requires advancement in both activity and stability, where attaining high stability is of extreme importance as the catalysts are expected to work efficiently under frequent start-up/shut down circumstances for at least several thousand hours. Alloying platinum with early transition metals (i.e., Pt–La alloy) is revealed as efficient catalysts construction strategy to potentially satisfy these demands. Here we report a Pt5La intermetallic compound synthesized by a novel and facile strategy. Due to the strong electronic interactions between Pt and La, the resultant Pt5La alloy catalyst exhibits enhanced activity with half wave of 0.92 V and mass activity of 0.49 A·mgPt−1, which strictly follows the 4e transfer pathway. More importantly, the catalyst performs superior stability during 30,000 cycles of accelerated stressed test (AST) with mass activity retention of 93.9%. This study provides new opportunities for future applications of Pt-rare earth metal alloy with excellent electrocatalytic properties.

Keywords: oxygen reduction reaction, electrocatalysis, intermetallic compound, rare earth metal

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Publication history
Copyright
Acknowledgements

Publication history

Received: 10 June 2022
Revised: 26 July 2022
Accepted: 04 August 2022
Published: 22 September 2022
Issue date: February 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

The work was supported by National Key R&D Program of China (No. 2021YFA1501101), the National Natural Science Foundation of China (Nos. 21875243, 21673220, 21733004, and U1601211), the Jilin Province Science and Technology Development Program (Nos. 20190201270JC, 20180101030JC, and 20200201001JC), Dalian National Laboratory for Clean Energy (DNL), Chinese Academy of Sciences (CAS), and the Research Innovation Fund (No. DNL202010).

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