Metal-organic framework-derived Fe3C@NC nanohybrids as highly-efficient oxygen reduction electrocatalysts in both acidic and basic media

Xinxin Yang, Xiaoli Hu, Xiuli Wang, Wei Fu, Xingquan He, Tewodros Asefa

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Developing low-cost and high-performance non-precious metal catalysts (NPMCs) for oxygen reduction reaction (ORR) is of critical importance for commercialization of fuel cells. Herein, we report a NPMC consisting of Fe3C nanoparticles encapsulated in mesoporous N-doped carbon (N-C), which is synthesized by a simple two-step strategy comprising pyrolysis of a mixture of MIL-100(Fe) and dicyandiamide under inert atmosphere, followed by treatment of the product with acidic solution to leach removable Fe3C species from the material. Fe3C@NC-800 (the material prepared at 800 °C) exhibits superior electrocatalytic activity, high durability and excellent methanol tolerance for ORR, with catalytic performance comparable to that of commercial Pt/C in both alkaline and acidic media. Fe3C@NC-800's excellent catalytic activity and stability in ORR are due to its large BET surface area, its large total pore volume, its nitrogen dopants and the cooperative effects between the reactive functionalities in it as well as its excellent conductivity.

Original languageEnglish
Pages (from-to)755-764
Number of pages10
JournalJournal of Electroanalytical Chemistry
Volume823
DOIs
Publication statusPublished - Aug 15 2018

Keywords

  • Electrocatalysts
  • Iron carbide
  • N-doped carbon
  • Oxygen reduction reaction

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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