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

doi:10.1149/1.1946530

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

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

104 Citations (Scopus)

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 language	English
Pages (from-to)	E247-E250
Journal	Journal of the Electrochemical Society
Volume	152
Issue number	8
DOIs	https://doi.org/10.1149/1.1946530
Publication status	Published - 2005

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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

Abstract

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