Interaction of Aluminum and Platinum Surfaces with the Ionic Liquids 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

The processes at the interface between ionic liquids (ILs) and metals are a key factor for understanding especially in electrochemical deposition, nanoscale tribology applications batteries. In present work, interfaces of 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([Py1,4]TFSI) 1-ethyl-3-methylimidazolium ([EMIm]TFSI) platinum aluminum were investigated by depositing thin IL films studying them with X-ray photoelectron spectroscopy (XPS) ultrahigh vacuum. It is found that there no evidence decomposition reaction either on platinum; however, imidazolium cation [EMIm]TFSI shows strong interaction surface monolayer regime. contrast, [Py1,4]TFSI show massive without applying any potential. spectra [TFSI]− anion components cleavage C-F or N-S bonds both cases. Both single fluorine atom complete observed, leading to further reactions anion. Consequently, new such as AlOOH, Al(OH)3, Al2S3, Al2(SO4)3 AlF3 appear interface. addition, also splitting off hydrogen atoms parts alkyl chain ILs.