Porous Core-Shell Fe3C Embedded N-doped Carbon Nanofibers as an Effective Electrocatalysts for Oxygen Reduction Reaction

ACS Applied Materials & Interfaces
Guangyuan RenLei Jiang

Abstract

The development of nonprecious-metal-based electrocatalysts with high oxygen reduction reaction (ORR) activity, low cost, and good durability in both alkaline and acidic media is very important for application of full cells. Herein, we developed a facile and economical strategy to obtain porous core-shell Fe3C embedded nitrogen-doped carbon nanofibers (Fe3C@NCNF-X, where X denotes pyrolysis temperature) by electrospinning of polyvinylidene fluoride (PVDF) and FeCl3 mixture, chemical vapor phase polymerization of pyrrole, and followed by pyrolysis of composite nanofibers at high temperatures. Note that the FeCl3 and polypyrrole acts as precursor for Fe3C core and N-doped carbon shell, respectively. Moreover, PVDF not only plays a role as carbon resources, but also provides porous structures due to hydrogen fluoride exposure originated from thermal decomposition of PVDF. The resultant Fe3C@NCNF-X catalysts, particularly Fe3C@NCNF-900, showed efficient electrocatalytic performance for ORR in both alkaline and acidic solutions, which are attributed to the synergistic effect between Fe3C and N-doped carbon as catalytic active sites, and carbon shell protects Fe3C from leaching out. In addition, the Fe3C@NCNF-X catalyst displayed a b...Continue Reading

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Citations

Aug 11, 2017·Chemistry : a European Journal·Xinghua ChenYuanjian Zhang
Mar 21, 2017·Chemical Communications : Chem Comm·Hankun YangXueji Zhang
Jul 7, 2018·ACS Applied Materials & Interfaces·Zexing WuXien Liu
Sep 10, 2020·ACS Applied Materials & Interfaces·Yunwu LiLiqiang Xu
Sep 18, 2018·ACS Applied Materials & Interfaces·Moumita RanaUjjal K Gautam

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