Simple liquid-phase synthesis of cobalt carbide (Co2C) nanoparticles and their use as durable electrocatalysts

Mizuho Yabushita, Atsushi Neya, Kanae Endo, Masafumi Nakaya, Kiyoshi Kanie, Atsushi Muramatsu

Research output: Contribution to journalArticlepeer-review

Abstract

Cobalt carbide (Co2C) nanoparticles were synthesized simply in liquid phase using Co(II) acetylacetonate and oleylamine under reflux conditions. Even in the presence of carbon black XC-72, Co2C nanoparticles were formed and simultaneously deposited on the carbon surface. The thin layer consisting of cobalt (oxy)hydroxide was present on the outermost surface of the thus-prepared Co2C nanoparticles, which was confirmed by X-ray photoelectron spectroscopy, but the redox treatment using a cyclic voltammetry technique gradually removed such byproduct phase. The resulting Co2C nanoparticles supported on XC-72 exhibited high durability for the oxygen reduction reaction.

Original languageEnglish
Pages (from-to)1632-1638
Number of pages7
JournalMaterials Transactions
Volume62
Issue number11
DOIs
Publication statusPublished - 2021

Keywords

  • Cobalt carbide nanoparticles
  • Electrode catalyst
  • Liquid-phase synthesis
  • Oxygen reduction reaction
  • Wet chemistry

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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