An SFG/DFG investigation of CN- adsorption at an Au electrode in 1-butyl-1-methyl-pyrrolidinium bis(trifluoromethylsulfonyl) amide ionic liquid

作者：Bozzini Benedetto^*; Bund Andreas; Busson Bertrand; Humbert Christophe; Ispas Adriana; Mele Claudio; Tadjeddine Abderrahmane

来源：Electrochemistry Communications, 2010, 12(1): 56-60.

DOI：10.1016/j.elecom.2009.10.035

• Ionic liquid
• [BMP][TFSA]
• Spectroelectrochemistry
• SFG
• DFG
• Cyanide

In this paper we report an SFG/DFG investigation of the adsorption of CN- - used as a probe molecule to study the electrochemical double-layer structure - at a polycrystalline Au electrode in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl) amide ([BMP][TFSA]) room-temperature ionic liquid (RTIL). The adsorption of CN- yielded single SFG and DFG bands in the range from ca. 2125 to 2135 cm(-1), exhibiting a Stark tuning of ca. 3 cm(-1) V-1. Vibrational resonances - corresponding to modes of the RTIL coadsorbed with CN-, were found in the range from ca. 1200 to 1500 cm(-1). The study of the double-layer structure was complemented by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements, from which the differential double-layer capacity (C-DL) was estimated.

• 出版日期2010-1