Reaction entropies of some redox couples in ionic liquids

Y. Yamato, Yasushi 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 publicationECS Transactions
Pages167-174
Number of pages8
Volume50
Edition11
DOIs
Publication statusPublished - 2012
Event18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting - Honolulu, HI, United States
Duration: 2012 Oct 72012 Oct 12

Other

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

Fingerprint

Ionic liquids
Entropy
Voltammetry
Oxidation-Reduction
Amides
Negative ions
Positive ions
Temperature
Ions

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Yamato, Y., Katayama, Y., & Miura, T. (2012). Reaction entropies of some redox couples in ionic liquids. In ECS Transactions (11 ed., Vol. 50, pp. 167-174) https://doi.org/10.1149/05011.0167ecst

Reaction entropies of some redox couples in ionic liquids. / Yamato, Y.; Katayama, Yasushi; Miura, T.

ECS Transactions. Vol. 50 11. ed. 2012. p. 167-174.

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

Yamato, Y, Katayama, Y & Miura, T 2012, Reaction entropies of some redox couples in ionic liquids. in ECS Transactions. 11 edn, vol. 50, pp. 167-174, 18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting, Honolulu, HI, United States, 12/10/7. https://doi.org/10.1149/05011.0167ecst
Yamato Y, Katayama Y, Miura T. Reaction entropies of some redox couples in ionic liquids. In ECS Transactions. 11 ed. Vol. 50. 2012. p. 167-174 https://doi.org/10.1149/05011.0167ecst
Yamato, Y. ; Katayama, Yasushi ; Miura, T. / Reaction entropies of some redox couples in ionic liquids. ECS Transactions. Vol. 50 11. ed. 2012. pp. 167-174
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