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Research Article

The promoting effect of interstitial hydrogen on the oxygen reduction performance of PtPd alloy nanotubes for fuel cells

Tingting Chao1,§, Xuan Luo2,§, Mengzhao Zhu1,§, Yanmin Hu1, Yida Zhang3, Yunteng Qu1, Hantao Peng4, Xiaoshuang Shen5, Xusheng Zheng3, Liang Zhang2( ), Xun Hong1( )
Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
Country Center for Combustion Energy and School of Vehicle and Mobility, Tsinghua University, Beijing 100084, China
National Synchrotron Radiation Laboratory (NSRL), University of Science and Technology of China, Hefei 230029, China
Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
School of Physical Science and Technology, Yangzhou University, Yangzhou 225002, China

§ Tingting Chao, Xuan Luo, and Mengzhao Zhu contributed equally to this work.

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Graphical Abstract

Interfacial reaction driving force together with capillary force facilitates the transient infiltration of molten Li into a three-dimensional (3D) host for stable 3D composite lithium anode.

Abstract

Highly efficient and stable oxygen reduction reaction (ORR) electrocatalysts are remarkably important but challenging for advancing the large-scale commercialization of practical proton exchange membrane fuel cells (PEMFCs). In this work, we report that the introduction of interstitial hydrogen atoms into PtPd nanotubes can significantly promote ORR performance without scarifying the durability. The enhanced mass activity was 8.8 times higher than that of commercial Pt/C. The accelerated durability test showed negligible activity attenuation after 30,000 cycles. Additionally, H2/O2 fuel cell tests further verified the excellent activity of PtPd-H nanotubes with a maximum power density of 1.32 W·cm−2, superior to that of commercial Pt/C (1.16 W·cm−2). Density functional theory calculations demonstrated the incorporation of hydrogen atoms gives rise to the broadening of Pt d-band and the downshift of d-band center, which consequently leads to the weaker intermediates binding and enhanced ORR activity.

Keywords

hydrogen atoms incorporationalloyd-band structure regulationoxygen reduction reactionfuel cell

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Nano Research
Volume 16 Issue 2,
February 2023
Pages 2366-2372
DOI: 10.1007/s12274-022-4891-4
Cite this article:
Chao T, Luo X, Zhu M, et al. The promoting effect of interstitial hydrogen on the oxygen reduction performance of PtPd alloy nanotubes for fuel cells. Nano Research, 2023, 16(2): 2366-2372. https://doi.org/10.1007/s12274-022-4891-4
Topics:
Fuel cellsOxygen reduction reaction

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Received: 17 June 2022
Revised: 08 August 2022
Accepted: 09 August 2022
Published: 30 August 2022
© Tsinghua University Press 2022
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