Reaction entropies of some redox couples in ionic liquids

Y. Yamato, Y. Katayama, T. Miura

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

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationMolten Salts and Ionic Liquids 18
Pages167-174
Number of pages8
Edition11
DOIs
Publication statusPublished - 2012 Dec 1
Event18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting - Honolulu, HI, United States
Duration: 2012 Oct 72012 Oct 12

Publication series

NameECS Transactions
Number11
Volume50
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting
CountryUnited States
CityHonolulu, HI
Period12/10/712/10/12

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Yamato, Y., Katayama, Y., & Miura, T. (2012). Reaction entropies of some redox couples in ionic liquids. In Molten Salts and Ionic Liquids 18 (11 ed., pp. 167-174). (ECS Transactions; Vol. 50, No. 11). https://doi.org/10.1149/05011.0167ecst