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

Yasushi Katayama, Kaori Sekiguchi, Masaki Yamagata, Takashi Miura

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Abstract

The electrochemical behavior of oxygen (O2)/superoxide ion (O2-) couple was investigated with the aid of the ultramicroelectrode technique in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) room-temperature molten salt (ionic liquid). The diffusion coefficient of O2 was ( 1.8 ± 0.2) × 106 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 O 2/O2- couple was 1.13 V vs ferrocene/ ferrocenium.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume152
Issue number8
DOIs
Publication statusPublished - 2005

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inorganic peroxides
molten salts
imides
Superoxides
Molten materials
diffusion coefficient
Salts
Ions
Oxygen
room temperature
oxygen
ions
Imides
Ionic Liquids
Temperature
solubility
Ionic liquids
activation energy
temperature dependence
Solubility

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

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title = "Electrochemical behavior of oxygen/superoxide ion couple in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide room-temperature molten salt",
abstract = "The electrochemical behavior of oxygen (O2)/superoxide ion (O2-) couple was investigated with the aid of the ultramicroelectrode technique in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) room-temperature molten salt (ionic liquid). The diffusion coefficient of O2 was ( 1.8 ± 0.2) × 106 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 O 2/O2- couple was 1.13 V vs ferrocene/ ferrocenium.",
author = "Yasushi Katayama and Kaori Sekiguchi and Masaki Yamagata and Takashi Miura",
year = "2005",
doi = "10.1149/1.1946530",
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journal = "Journal of the Electrochemical Society",
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publisher = "Electrochemical Society, Inc.",
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T1 - Electrochemical behavior of oxygen/superoxide ion couple in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide room-temperature molten salt

AU - Katayama, Yasushi

AU - Sekiguchi, Kaori

AU - Yamagata, Masaki

AU - Miura, Takashi

PY - 2005

Y1 - 2005

N2 - The electrochemical behavior of oxygen (O2)/superoxide ion (O2-) couple was investigated with the aid of the ultramicroelectrode technique in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) room-temperature molten salt (ionic liquid). The diffusion coefficient of O2 was ( 1.8 ± 0.2) × 106 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 O 2/O2- couple was 1.13 V vs ferrocene/ ferrocenium.

AB - The electrochemical behavior of oxygen (O2)/superoxide ion (O2-) couple was investigated with the aid of the ultramicroelectrode technique in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) room-temperature molten salt (ionic liquid). The diffusion coefficient of O2 was ( 1.8 ± 0.2) × 106 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 O 2/O2- couple was 1.13 V vs ferrocene/ ferrocenium.

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