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 | |
| Publication status | Published - 2005 Oct 7 |
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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Katayama, Y., Sekiguchi, K., Yamagata, M., & Miura, T. (2005). Electrochemical behavior of oxygen/superoxide ion couple in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide room-temperature molten salt. Journal of the Electrochemical Society, 152(8), E247-E250. https://doi.org/10.1149/1.1946530