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

Wei Zhou, Soya Inoue, Takashi Iwahashi, Kaname Kanai, Kazuhiko Seki, Takayuki Miyamae, Doseok Kim, Yasushi Katayama, Yukio Ouchi

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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.

Original languageEnglish
Pages (from-to)672-675
Number of pages4
JournalElectrochemistry Communications
Issue number5
Publication statusPublished - 2010 May 1



  • Adsorption hysteresis
  • Ionic liquids
  • Pt
  • SFG spectroscopy

ASJC Scopus subject areas

  • Electrochemistry

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