Double layer structure and adsorption/desorption hysteresis of neat ionic liquid on Pt electrode surface — an in-situ IR-visible sum-frequency generation spectroscopic study
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- 作者：Wei Zhou ; Soya Inoue ; Takashi Iwahashi ; Kaname Kanai ; Kazuhiko Seki ; Takayuki Miyamae ; Doseok Kim ; Yasushi Katayama ; Yukio Ouchi
- 关键词：Ionic liquids ; Pt ; Adsorption hysteresis ; SFG spectroscopy
- 刊名：Electrochemistry Communications
- 出版年：2010
- 出版时间：May 2010
- 年：2010
- 卷：12
- 期：5
- 页码：672-675
- 全文大小：388 K
文摘
The electrochemical interface between a polycrystalline Pt electrode and the ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([bmim][OTf]) has been studied by in-situ IR-visible sum-frequency generation (SFG) spectroscopy. Potential dependent adsorption/desorption processes of OTf anions has been monitored within the electrochemical window. SFG results indicate that the ions form a double layer structure at the interface. Significant adsorption/desorption hysteresis has been observed for the anions on the Pt surface.