Direct observation of Au(111) electrode surface structure in bis(trifluoromethylsulfonyl)amide-based ionic liquids using surface X-ray scattering

The surface structure of Au(111) electrodes in hydrophobic ionic liquids, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide ([BMP]TFSA) and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide ([BMIM]TFSA) was investigated using surface X-ray scattering. In both [BMP]TFSA and...

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Bibliographic Details
Published in:Electrochemistry communications 2011-05, Vol.13 (5), p.411-413
Main Authors: Tamura, Kazuhisa, Miyaguchi, Shin-ichiro, Sakaue, Kiyoshi, Nishihata, Yasuo, Mizuki, Jun'ichiro
Format: Article
Language:English
Subjects:
Au electrode
Bis(trifluoromethylsulfonyl)amide
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Ionic liquid
Surface structure
Surface X-ray scattering
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Summary:The surface structure of Au(111) electrodes in hydrophobic ionic liquids, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide ([BMP]TFSA) and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide ([BMIM]TFSA) was investigated using surface X-ray scattering. In both [BMP]TFSA and [BMIM]TFSA, the reconstruction of the surface structure was observed and the phase transition between the (1 × 1) and the reconstructed structure was found to be reversible. On the other hand, the area of the reconstructed structure in [BMP]TFSA was larger than that in [BMIM]TFSA. These differences suggest that the [BMIM] +–Au interaction is stronger than the [BMP] +–Au interaction.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2011.02.006