Surface-enhanced Raman scattering (SERS) of a copper electrode in 1-n-butyl-3-methylimidazolium tetrafluoroborate ionic liquid

Surface-enhanced Raman scattering (SERS) on copper electrodes in 1-n-butyl-3-methylimidazoliun tetrafluorbarate (BMI.BF4): The adsorption of benzotriazole (BTAH)

“…The CV of the copper electrode in the absence of BTAH ( Fig. 1a) is very similar to the one previously published [15]. Two oxidation waves should be expected, one near −0.67 V and another at ca.…”

“…1 were recorded at 20 mV s −1 while those presented in Ref. [15] were obtained at 100 mV s −1 The difference in the scan velocity accounts for the differences in the observed current intensities. As indicated in the CVs, the presence of BTAH causes a decrease in the anodic currents at potentials more positive than 0.4 V, indicating that BTAH inhibits the oxidation of the copper electrode.…”

“…Recently it has been shown that silver [14] and copper [15] SERSactive substrates can be electrochemically generated in situ using ILs as solvents and electrolytes. Therefore, in this work we will use the SERS effect to investigate the structure of the interface formed by a copper electrode in 1-n-butyl-3-methylimidazolium tetrafluoroborate (BMI.BF 4 ) IL in the presence of BTAH and to characterize the surface species.…”

Electrodeposition of Au from [EMIm][TFSA] room-temperature ionic liquid: An electrochemical and Surface-Enhanced Raman Spectroscopy study

“…Moreover, electrochemical properties of electrodeposited polymers were followed by in situ FTIR [18,19], Vis-UV [20,21] and Raman [21] spectroelectrochemistry in ionic liquids. In the previous literature reports, SERS has been successfully used for investigating the interface between an electrified metal electrode and RTILs [6,7]. These pioneering works proved that important information about the vibrational modes and the structure of the RTILs can be obtained by SERS, in analogy with cognate work typically performed in aqueous or mixed aqueous-organic electrolytes.…”

“…Since the structure of the RTIL/electrode interface is still an open question, acquiring in situ molecular-level information on this system is highly desirable, in particular for those cases in which faradaic reactions and co-adsorption processes complicate the scenario. At the time of this writing, the following techniques have been reported: FT-IR [4], SEIRA [5], SERS [6,7] and SFG [8][9][10][11][12]. Some literature reports can be found regarding the monitoring of electrochemical doping in a selection of ionic liquids of different types of fullerene-and CNT-based materials by in situ ATR-FTIR [13], Raman [14][15][16][17] and Vis-NIR [16,17].…”