Electrode kinetics of ferrocenium/ferrocene in room-temperature ionic liquids

Naoki Tachikawa, Yasushi Katayama, Takashi Miura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

The diffusion coefficients and heterogeneous rate constants of ferrocenium/ferrocene ([Fe(Cp)2]+/Fe(Cp)2) were investigated in order to elucidate the role of solvent dynamics on the electrode kinetics in hydrophobic room-temperature ionic liquids based on bis(trifluoromethylsulfonyl)imide (TFSI-). The [Fe(Cp) 2]+/Fe(Cp)2 redox reaction was reversible from cyclic voltammetry of a platinum electrode. The diffusion coefficient of Fe(Cp)2 was inversely proportional to the viscosity of the ionic liquid. The diffusion coefficients of [Fe(Cp)2]+ in the ionic liquids were smaller than those of Fe(Cp)2 because of the Coulombic interaction between charged species and the ionic liquids. The apparent heterogeneous rate constants of [Fe(Cp)2] +/Fe(Cp)2 estimated by the electrochemical impedance spectroscopy in the ionic liquids were smaller than those in organic solvents. The heterogeneous rate constants correlate with the viscosity of the electrolytes probably due to the slow dynamics of the ions composing the ionic liquids.

Original languageEnglish
Title of host publicationECS Transactions - Molten Salts and Ionic Liquids 16 - 214th ECS Meeting
Pages589-595
Number of pages7
Edition49
DOIs
Publication statusPublished - 2008 Dec 1
EventMolten Salts and Ionic Liquids 16 - 214th ECS Meeting - Honolulu, HI, United States
Duration: 2008 Oct 122008 Oct 17

Publication series

NameECS Transactions
Number49
Volume16
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherMolten Salts and Ionic Liquids 16 - 214th ECS Meeting
CountryUnited States
CityHonolulu, HI
Period08/10/1208/10/17

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Electrode kinetics of ferrocenium/ferrocene in room-temperature ionic liquids'. Together they form a unique fingerprint.

  • Cite this

    Tachikawa, N., Katayama, Y., & Miura, T. (2008). Electrode kinetics of ferrocenium/ferrocene in room-temperature ionic liquids. In ECS Transactions - Molten Salts and Ionic Liquids 16 - 214th ECS Meeting (49 ed., pp. 589-595). (ECS Transactions; Vol. 16, No. 49). https://doi.org/10.1149/1.3159365