Electrochemical behavior of oxygen / superoxide ion couple in 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfone)imide room-temperature molten salt

Yasushi Katayama, Kaori Sekiguchi, Masaki Yamagata, Takashi Miura

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

Abstract

The electrochemical behavior of oxygen (O2) superoxide ion (O2) couple was investigated with the aid of ultra micro electrode technique in 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfone)imide room-temperature molten salt. The diffusion coefficient of O2 was (1.8 ± 0.2) × 10-6 cm2 s-1 at 25°C. The activation energy of the diffusion process of O2 was estimated to be 27 kJ mol-1 from the temperature dependence of the diffusion coefficient. The solubility of O2 in BMPTFSI was 14 mmol dm-3 at 25°C and decreased with an increase in temperature. The diffusion coefficient of O2- was 0.86 × 10 -6 cm2 s-1 at 25°C. The formal potential of O2 O2- couple was 1.13 V vs. ferrocene / ferrocenium.

Original languageEnglish
Title of host publicationMolten Salts XIV - Proceedings of the International Symposium
Pages503-512
Number of pages10
Publication statusPublished - 2006 Dec 1
Event206th ECS Meeting - Honolulu, HI, United States
Duration: 2004 Oct 32004 Oct 8

Publication series

NameProceedings - Electrochemical Society
VolumePV 2004-24

Other

Other206th ECS Meeting
CountryUnited States
CityHonolulu, HI
Period04/10/304/10/8

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Katayama, Y., Sekiguchi, K., Yamagata, M., & Miura, T. (2006). Electrochemical behavior of oxygen / superoxide ion couple in 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfone)imide room-temperature molten salt. In Molten Salts XIV - Proceedings of the International Symposium (pp. 503-512). (Proceedings - Electrochemical Society; Vol. PV 2004-24).