Nano-Micro Letters

Stepwise Fabrication of Co-Embedded Porous Multichannel Carbon Nanofibers for High-Efficiency Oxygen Reduction

Zeming Tang1, Yingxuan Zhao1, Qingxue Lai1,*, Jia Zhong1, Yanyu Liang1,2,*

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Nano-Micro Lett. (2019) 11: 33

First Online: 06 April 2019 (Article)

DOI:10.1007/s40820-019-0264-2

*Corresponding author. E-mail: laiqingxue@126.com (Qingxue Lai) ; liangyy403@126.com (Yanyu Liang)

 

Abstract

 


Toc

A novel nonprecious metal material consisting of Co-embedded porous interconnected multichannel carbon nanofibers (Co/IMCCNFs) was rationally designed for oxygen reduction reaction (ORR) electrocatalysis. In the synthesis, ZnCo2O4 was employed to form interconnected mesoporous channels and provide highly active Co3O4/Co core–shell nanoparticle-based sites for the ORR. The IMC structure with a large synergistic effect of the N and Co active sites provided fast ORR electrocatalysis kinetics. The Co/IMCCNFs exhibited a high half-wave potential of 0.82 V (vs. reversible hydrogen electrode) and excellent stability with a current retention up to 88% after 12,000 cycles in a current–time test, which is only 55% for 30 wt% Pt/C.


 

Keywords

Nonprecious metal material; Multichannel carbon nanofiber; Oxygen reduction reaction; Core–shell nanoparticle; Synergistic effect

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