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Research Article

Facile synthesis of FeCo@NC core-shell nanospheres supported on graphene as an efficient bifunctional oxygen electrocatalyst

Nan Wu1, Yongpeng Lei2( ), Qichen Wang1,3, Bing Wang1, Cheng Han1, Yingde Wang1,4( )
Science and Technology on Advanced Ceramic Fibers and Composites Laboratory National University of Defense Technology Changsha 410073 China
College of Basic Education National University of Defense Technology Changsha 410073 China
College of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004 China
College of Materials Science and Engineering Wuhan Textile University Wuhan 430074 China
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Graphical Abstract

Abstract

Electrocatalytic conversion of oxygen holds great potential for clean energy technologies, including water electrolysis, regenerative fuel cells, and rechargeable metal-air batteries. The development of highly efficient and inexpensive oxygen electrocatalysts as replacements for precious metal-based catalysts is vitally important for large-scale practical application in the future. A bifunctional oxygen electrocatalyst based on FeCo nanoparticles/N-doped carbon core-shell spheres supported on N-doped graphene sheets was prepared via one-step pyrolysis of graphitic carbon nitride and acetylacetonates. The optimized product exhibited an oxygen electrode activity of 0.87 V and excellent durability. The remarkable performance is mainly attributed to the synergetic effect arising from the FeCo nanoparticles and N-doped carbon shell. This study introduces an inexpensive and simple way to develop highly active bifunctional oxygen electrocatalysts.

Keywords

iron-cobalt alloycarbon nitridenitrogen-doped carboncore-shell structurebifunctional oxygen electrocatalyst

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Nano Research
Volume 10 Issue 7,
July 2017
Pages 2332-2343
DOI: 10.1007/s12274-017-1428-3
Cite this article:
Wu N, Lei Y, Wang Q, et al. Facile synthesis of FeCo@NC core-shell nanospheres supported on graphene as an efficient bifunctional oxygen electrocatalyst. Nano Research, 2017, 10(7): 2332-2343. https://doi.org/10.1007/s12274-017-1428-3

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Received: 25 November 2016
Revised: 16 December 2016
Accepted: 18 December 2016
Published: 01 March 2017
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2017
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