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Research Article | Online first | Published: 23 March 2024

Pt single atoms coupled with Ru nanoclusters enable robust hydrogen oxidation for high-performance anion exchange membrane fuel cells

Show Author's Information Jianmei Wang1,  Bingxing Zhang1,  Xiaozhong Zheng1,  Xuerui Liu2,3,  Wei Guo1,  Zhouxin Luo1,  Yongfeng Liu1,  Mingxia Gao1,  Jian Chen4,  Zhongbin Zhuang2,3( ),  Hongge Pan4,  Wenping Sun1,5( )
School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China
Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
State Key Lab of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
Institute of Science and Technology for New Energy, Xi’an Technological University, Xi’an 710021, China
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Keywords:
nanoclusters, electrocatalysis, multiscale structure, hydrogen oxidation reaction, anion exchange membrane fuel cells
Topics:
Electrocatalysis ElectrocatalystsFuel cells
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Wang J, Zhang B, Zheng X, et al. Pt single atoms coupled with Ru nanoclusters enable robust hydrogen oxidation for high-performance anion exchange membrane fuel cells. Nano Research, 2024, https://doi.org/10.1007/s12274-024-6604-7
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Abstract Full text Electronic supplementary material About this article

The sluggish reaction kinetics of alkaline hydrogen oxidation reaction (HOR) is one of the key challenges for anion exchange membrane fuel cells (AEMFCs). To achieve robust alkaline HOR with minimized cost, we developed a single atom-cluster multiscale structure with isolated Pt single atoms anchored on Ru nanoclusters supported on nitrogen-doped carbon nanosheets (Pt1-Ru/NC). The well-defined structure not only provides multiple sites with varied affinity with the intermediates but also enables simultaneous modulation of different sites via interfacial interaction. In addition to weakening Ru–H bond strength, the isolated Pt sites are heavily involved in hydrogen adsorption and synergistically accelerate the Volmer step with the help of Ru sites. Furthermore, this catalyst configuration inhibits the excessive occupancy of oxygen-containing species on Ru sites and facilitates the HOR at elevated potentials. The Pt1-Ru/NC catalyst exhibits superior alkaline HOR performance with extremely high activity and excellent CO-tolerance. An AEMFC with a 0.1 mg·cmPGM−2 loading of Pt1-Ru/NC anode catalyst achieves a peak powder density of 1172 mW·cm−2, which is 2.17 and 1.55 times higher than that of Pt/C and PtRu/C, respectively. This work provides a new catalyst concept to address the sluggish kinetics of electrocatalytic reactions containing multiple intermediates and elemental steps.


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Electronic supplementary material
About this article

Pt single atoms coupled with Ru nanoclusters enable robust hydrogen oxidation for high-performance anion exchange membrane fuel cells

Show Author's information Jianmei Wang1, Bingxing Zhang1, Xiaozhong Zheng1, Xuerui Liu2,3, Wei Guo1, Zhouxin Luo1, Yongfeng Liu1, Mingxia Gao1, Jian Chen4, Zhongbin Zhuang2,3( ), Hongge Pan4, Wenping Sun1,5( )
School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China
Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
State Key Lab of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
Institute of Science and Technology for New Energy, Xi’an Technological University, Xi’an 710021, China
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Abstract

The sluggish reaction kinetics of alkaline hydrogen oxidation reaction (HOR) is one of the key challenges for anion exchange membrane fuel cells (AEMFCs). To achieve robust alkaline HOR with minimized cost, we developed a single atom-cluster multiscale structure with isolated Pt single atoms anchored on Ru nanoclusters supported on nitrogen-doped carbon nanosheets (Pt1-Ru/NC). The well-defined structure not only provides multiple sites with varied affinity with the intermediates but also enables simultaneous modulation of different sites via interfacial interaction. In addition to weakening Ru–H bond strength, the isolated Pt sites are heavily involved in hydrogen adsorption and synergistically accelerate the Volmer step with the help of Ru sites. Furthermore, this catalyst configuration inhibits the excessive occupancy of oxygen-containing species on Ru sites and facilitates the HOR at elevated potentials. The Pt1-Ru/NC catalyst exhibits superior alkaline HOR performance with extremely high activity and excellent CO-tolerance. An AEMFC with a 0.1 mg·cmPGM−2 loading of Pt1-Ru/NC anode catalyst achieves a peak powder density of 1172 mW·cm−2, which is 2.17 and 1.55 times higher than that of Pt/C and PtRu/C, respectively. This work provides a new catalyst concept to address the sluggish kinetics of electrocatalytic reactions containing multiple intermediates and elemental steps.

Keywords: nanoclusters, electrocatalysis, multiscale structure, hydrogen oxidation reaction, anion exchange membrane fuel cells

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Publication history
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Acknowledgements

Publication history

Received: 28 January 2024
Revised: 29 February 2024
Accepted: 03 March 2024
Published: 23 March 2024

Copyright

© Tsinghua University Press 2024

Acknowledgements

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 52171224 and 92261119). J. M. W. acknowledges support from Zhejiang Province Postdoctoral Science Foundation (No. ZJ2022003) and China Postdoctoral Science Foundation (No. 2023M733020). The authors thank the staff of beamline BL11B at the Shanghai Synchrotron Radiation Facility and the staff at Photoemission End-station (BL10B) in the National Synchrotron Radiation Laboratory (NSRL) for their support in XAS measurements.

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