Electrochemical behavior of tris(2,2'-bipyridine)cobalt complex in some ionic liquids

Yasushi Katayama, Shota Nakayama, Naoki Tachikawa, Kazuki Yoshii

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The electrode reaction of tris(2,2'-bipyridine)cobalt complex, [Co(bpy)3]3+/2+, was investigated in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) and 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) ionic liquids. The diffusion of [Co(bpy)3]2+ and [Co(bpy)3]3+ was affected by the viscosity and the charge densities of the complexes and the anion of ionic liquid. The difference in the electron configurations of [Co(bpy)3]2+ and [Co(bpy)3]3+ is considered to cause the slow charge transfer and large reaction entropy change.

Original languageEnglish
Pages (from-to)H5286-H5291
JournalJournal of the Electrochemical Society
Issue number8
Publication statusPublished - 2017

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry


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