Electrode kinetics of some iron complexes in an imide-type room-temperature ionic liquid

Naoki Tachikawa, Yasushi Katayama, Takashi Miura

研究成果: Article査読

67 被引用数 (Scopus)

抄録

The electrode kinetics of [Fe (bpy)3] 3+ [Fe (bpy)3] 2+ (bpy=2, 2′ -bipyridine), [Fe (Cp)2] + [Fe (Cp)2] (Cp- =cyclopentadienyl), [FeCl4] - [FeCl4] 2- and [Fe (CN)6] 3- [Fe (CN)6] 4- on a platinum electrode was investigated over the temperature range from 25 to 60°C in a room-temperature ionic liquid, 1- n -butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI). The average activation energy for the diffusion coefficients of these complexes was ∼24 kJ mol-1, which was close to the activation energy for the viscosity of BMPTFSI. The diffusion coefficients of these complexes were found to be affected not only by the viscosity of BMPTFSI but also by the charge of the complexes. On the other hand, the heterogeneous rate constants of these redox reactions were estimated to be ∼ 10-4 cm s-1 by electrochemical impedance spectroscopy. The apparent heterogeneous rate constants of [Fe (bpy)3] 3+ [Fe (bpy)3] 2+, [Fe (Cp)2] + [Fe (Cp)2], and [Fe (CN)6] 3- [Fe (CN)6] 4- were smaller than those in other conventional solvents.

本文言語English
ページ(範囲)F211-F216
ジャーナルJournal of the Electrochemical Society
154
11
DOI
出版ステータスPublished - 2007 10月 5

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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