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

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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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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 21571038), Foundation of Guizhou Province (No. 2019-5666), Education Department of Guizhou Province (No. 2021312), State Key Laboratory of Coal Mine Disaster Dynamics and Control (Chongqing University, No. 2011DA105287-ZR202101), State Key Laboratory of Physical Chemistry of Solid Surfaces (Xiamen University, No. 202009), and the Open Fund of the Key Lab of Organic Optoelectronics & Molecular Engineering (Tsinghua University). We gratefully acknowledge Analytical and Testing Center of Chongqing University.

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  1. 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

    Rui Chen, Fengling Zhao, Xiaotong Yang & Qiang Yuan

  2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China

    Tie Shu, Yongfei Li, Li-Yong Gan & Ke Xin Yao

  3. Multi-scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies & School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China

    Jingwei Li, Daliang Zhang & Ke Xin Yao

  4. College of Physics and Center of Quantum Materials and Devices, Chongqing University, Chongqing, 401331, China

    Li-Yong Gan

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

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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 Res. 15, 9010–9018 (2022). https://doi.org/10.1007/s12274-022-4577-y

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