TY - GEN
T1 - Reaction entropies of some redox couples in ionic liquids
AU - Yamato, Y.
AU - Katayama, Y.
AU - Miura, T.
PY - 2013
Y1 - 2013
N2 - The temperature dependence of the potential, dE/dT, of some redox couples was investigated in different amide-type ionic liquids. The half-wave potentials of the redox couples were determined by DPV (differential pulse voltammetry). The halfwave potentials varied linearly with the temperature from 298 to 328 K in the ionic liquids. The reaction entropies (ΔrcS0) of the redox couples were calculated from the dE/dT values. ΔrcS0 of the redox couples with positive charges were affected mainly by the anions of ionic liquids. In contrast, ΔrcS0of the redox couples with negative charges depended on the cations of ionic liquids. These results suggest the coulombic interaction between the redox couples and the ions with the opposite sign of charge to those of the redox couples is a dominant factor determining ΔrcS0.
AB - The temperature dependence of the potential, dE/dT, of some redox couples was investigated in different amide-type ionic liquids. The half-wave potentials of the redox couples were determined by DPV (differential pulse voltammetry). The halfwave potentials varied linearly with the temperature from 298 to 328 K in the ionic liquids. The reaction entropies (ΔrcS0) of the redox couples were calculated from the dE/dT values. ΔrcS0 of the redox couples with positive charges were affected mainly by the anions of ionic liquids. In contrast, ΔrcS0of the redox couples with negative charges depended on the cations of ionic liquids. These results suggest the coulombic interaction between the redox couples and the ions with the opposite sign of charge to those of the redox couples is a dominant factor determining ΔrcS0.
UR - http://www.scopus.com/inward/record.url?scp=84885787355&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84885787355&partnerID=8YFLogxK
U2 - 10.1149/05011.0167ecst
DO - 10.1149/05011.0167ecst
M3 - Conference contribution
AN - SCOPUS:84885787355
SN - 9781607683599
T3 - ECS Transactions
SP - 167
EP - 174
BT - Molten Salts and Ionic Liquids 18
PB - Electrochemical Society Inc.
T2 - 18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting
Y2 - 7 October 2012 through 12 October 2012
ER -