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Research Article

PtCu3 nanoalloy@porous PWOx composites with oxygen container function as efficient ORR electrocatalysts advance the power density of room-temperature hydrogen-air fuel cells

Rui Chen1Tie Shu2Fengling Zhao1Yongfei Li2Xiaotong Yang1Jingwei Li3Daliang Zhang3Li-Yong Gan2,4( )Ke Xin Yao2,3( )Qiang Yuan1( )
State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
Multi-scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies & School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
College of Physics and Center of Quantum Materials and Devices, Chongqing University, Chongqing 401331, China
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Graphical Abstract

Porous PtCu3 nanoalloy@PWOx composites are employed as efficient oxygen-storing oxygen reduction reaction (ORR) electrocatalysts for practical room-temperature H2-air fuel cells.

Abstract

It is challenging and desirable to construct Pt-based nanocomposites with oxygen storage function as efficient oxygen reduction reaction (ORR) catalysts for practical proton exchange membrane fuel cells (PEMFCs). Herein, we achieve novel porous nanocomposites of PtCu3 nanoalloys-embedded in the PWOx matrix (PtCu3@PWOx), which has an oxygen container feature. The PtCu3@PWOx/C exhibits an ultrahigh mass activity (MA) of 3.94 A·mgPt−1 for ORR, which is 26.3 times as high as the commercial Pt/C and the highest value ever reported for PtCu-based binary system. Theoretical calculations reveal that the compressive strain and d-band center downshift of Pt intrinsically contribute to the excellent ORR performance. In H2-air PEMFCs at room temperature, furthermore, the PtCu3@PWOx/C delivers a high power density (218.6 mW·cm−2), much superior to commercial Pt/C (131.6 mW·cm−2). In H2-O2 PEMFCs, PtCu3@PWOx/C outputs a maximum power density of 420.1 mW·cm−2. This work provides an effective idea for designing oxygen-storing ORR catalysts used for practical room-temperature H2-air fuel cells.

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Nano Research
Pages 9010-9018
Cite this article:
Chen R, Shu T, Zhao F, et al. PtCu3 nanoalloy@porous PWOx composites with oxygen container function as efficient ORR electrocatalysts advance the power density of room-temperature hydrogen-air fuel cells. Nano Research, 2022, 15(10): 9010-9018. https://doi.org/10.1007/s12274-022-4577-y
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Received: 16 April 2022
Revised: 21 May 2022
Accepted: 24 May 2022
Published: 21 June 2022
© Tsinghua University Press 2022
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