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Research Article | Open Access

Metal-coordinated porous polydopamine nanospheres derived Fe3N-FeCo encapsulated N-doped carbon as a highly efficient electrocatalyst for oxygen reduction reaction

Fanjuan Guo1Mingyue Zhang2Shicheng Yi1Xuxin Li1Rong Xin1Mei Yang1Bei Liu1Hongbiao Chen1( )Huaming Li1Yijiang Liu1( )
College of Chemistry and Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Xiangtan University, Xiangtan 411105, China
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
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Graphical Abstract


The exploration of high-efficiency, long-durability, and cost-effectiveness transition metal doped carbon materials to replace the commercial Pt/C in oxygen reduction reaction (ORR) is greatly desirable for promoting the advancement of sustainable energy devices. Herein, the Fe3N and FeCo alloy decorated N-doped carbon hybrid material (denoted Fe3N-FeCo@NC) is prepared and applied as the ORR catalyst, which is derived from the two-step pyrolysis of an intriguing complex consisted of metal-coordinated porous polydopamine (PDA) nanospheres (i.e., Fe-PDA@Co) and melamine. The resulting Fe3N-FeCo@NC delivers outstanding ORR activity with an onset potential (Eon) of 1.05 V, a half-wave potential (E1/2) of 0.89 V, as well as excellent long-term stability and methanol resistance over Pt/C. Interestingly, the home-made Zn-air battery with Fe3N-FeCo@NC as the air-cathode demonstrates much higher open-circuit voltage (1.50 vs. 1.48 V), power density (141 vs. 113 mW·cm−2) and specific capacity (806.6 vs. 660.6 mAh·gZn−1) than those of Pt/C counterpart. Such a remarkable ORR activity of Fe3N-FeCo@NC may stem from the synergistic effect of Fe3N and FeCo active species, the large surface area, the hierarchical porous structure and the exceptional sphere/sheet hybridized architecture.

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Nano Research Energy
Article number: 9120027
Cite this article:
Guo F, Zhang M, Yi S, et al. Metal-coordinated porous polydopamine nanospheres derived Fe3N-FeCo encapsulated N-doped carbon as a highly efficient electrocatalyst for oxygen reduction reaction. Nano Research Energy, 2022, 1: 9120027.










Received: 23 July 2022
Revised: 11 August 2022
Accepted: 15 August 2022
Published: 09 October 2022
© The Author(s) 2022. Published by Tsinghua University Press.

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