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 language | English |
|---|---|
| Title of host publication | ECS Transactions |
| Pages | 589-595 |
| Number of pages | 7 |
| Volume | 16 |
| Edition | 49 |
| DOIs | |
| Publication status | Published - 2008 |
| Event | Molten Salts and Ionic Liquids 16 - 214th ECS Meeting - Honolulu, HI, United States Duration: 2008 Oct 12 → 2008 Oct 17 |
Other
| Other | Molten Salts and Ionic Liquids 16 - 214th ECS Meeting |
|---|---|
| Country | United States |
| City | Honolulu, HI |
| Period | 08/10/12 → 08/10/17 |
Fingerprint
ASJC Scopus subject areas
- Engineering(all)
Cite this
Electrode kinetics of ferrocenium/ferrocene in room-temperature ionic liquids. / Tachikawa, Naoki; Katayama, Yasushi; Miura, Takashi.
ECS Transactions. Vol. 16 49. ed. 2008. p. 589-595.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Electrode kinetics of ferrocenium/ferrocene in room-temperature ionic liquids
AU - Tachikawa, Naoki
AU - Katayama, Yasushi
AU - Miura, Takashi
PY - 2008
Y1 - 2008
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=77649129070&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77649129070&partnerID=8YFLogxK
U2 - 10.1149/1.3159365
DO - 10.1149/1.3159365
M3 - Conference contribution
AN - SCOPUS:77649129070
SN - 9781615676422
VL - 16
SP - 589
EP - 595
BT - ECS Transactions
ER -