Oxygen reduction electrocatalysts based on coupled iron nitride nanoparticles with nitrogen-doped carbon

Min Jung Park, Jin Hee Lee, K. P S S Hembram, Kwang Ryeol Lee, Sang Soo Han, Chang Won Yoon, SukWoo Nam, Jin Young Kim

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18 Citations (Scopus)

Abstract

Aimed at developing a highly active and stable non-precious metal electrocatalyst for oxygen reduction reaction (ORR), a novel FexNy/NC nanocomposite—that is composed of highly dispersed iron nitride nanoparticles supported on nitrogen-doped carbon (NC)—was prepared by pyrolyzing carbon black with an iron-containing precursor in an NH3 atmosphere. The influence of the various synthetic parameters such as the Fe precursor, Fe content, pyrolysis temperature and pyrolysis time on ORR performance of the prepared iron nitride nanoparticles was investigated. The formed phases were determined by experimental and simulated X-ray diffraction (XRD) of numerous iron nitride species. We found that Fe3N phase creates superactive non-metallic catalytic sites for ORR that are more active than those of the constituents. The optimized Fe3N/NC nanocomposite exhibited excellent ORR activity and a direct four-electron pathway in alkaline solution. Furthermore, the hybrid material showed outstanding catalytic durability in alkaline electrolyte, even after 4,000 potential cycles.

Original languageEnglish
Article number86
JournalCatalysts
Volume6
Issue number6
DOIs
Publication statusPublished - 2016 Jun 15

Keywords

  • Iron nitride
  • Nitrogen-doped carbon
  • Non-precious metal electrocatalysts
  • Oxygen reduction reaction

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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    Park, M. J., Lee, J. H., Hembram, K. P. S. S., Lee, K. R., Han, S. S., Yoon, C. W., Nam, S., & Kim, J. Y. (2016). Oxygen reduction electrocatalysts based on coupled iron nitride nanoparticles with nitrogen-doped carbon. Catalysts, 6(6), [86]. https://doi.org/10.3390/catal6060086