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Research Article

One-step, in situ formation of WN-W2C heterojunctions implanted on N doped carbon nanorods as efficient oxygen reduction catalyst for metal-air battery

Yue Du1( ), Wenxue Chen1, Lina Zhou1, Rui Hu2, Shizhu Wang2, Xueqing Li1, Yunlong Xie1, Lun Yang1, Yisi Liu1( ), Zhenhui Liu2( )
Institute for Advanced Materials, Hubei Normal University, Huangshi 435002, China
College of Material Science and Engineering, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
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Graphical Abstract

WN-W2C heterojunctions were derived from polyoxometalate@polyaniline composite as effective and stable metal air electrode.

Abstract

Transition metal nitrides and carbides have attracted intensive attentions in metal-air battery application due to their metallic electron transport behavior and high chemical stability toward the oxygen reduction reaction (ORR). Herein, the polyoxometalate@polyaniline composite derived WN-W2C heterostructured composite (WN-W2C@pDC) has been fabricated through an in situ nitriding-carbonization strategy, with WN-W2C nanoparticles implanted on N doped carbon nanorods. As-fabricated WN-W2C@pDC demonstrates prominent electrocatalytic performance towards ORR and excellent cycling stability in metal-air battery, which possesses positive half-wave potential and large diffusion limiting current density (0.81 V and 5.8 mA·cm−2). Moreover, it demonstrates high peak power density of 157.4 mW·cm−2 as Al-air primary cathode and excellent stability at the discharge–charge test (> 500 h) of Zn-air secondary battery. The excellent activity and durability of WN-W2C@pDC catalyst should be attributed to the combined effect of intimate WN-W2C heterointerfaces, unique embedded nanoparticles structure, and excellent electrical media of N doped carbon, confirmed by a series of contrast experiments.

Keywords

WN-W2C heterojunctionspolyoxometalate@polyaniline compositeoxygen reduction reactionmetal-air battery

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Nano Research
Volume 16 Issue 7,
July 2023
Pages 8773-8781
DOI: 10.1007/s12274-023-5501-9
Cite this article:
Du Y, Chen W, Zhou L, et al. One-step, in situ formation of WN-W2C heterojunctions implanted on N doped carbon nanorods as efficient oxygen reduction catalyst for metal-air battery. Nano Research, 2023, 16(7): 8773-8781. https://doi.org/10.1007/s12274-023-5501-9
Topics:
Oxygen reduction reaction

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Received: 12 December 2022
Revised: 10 January 2023
Accepted: 12 January 2023
Published: 14 March 2023
© Tsinghua University Press 2023
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