Universidade Federal do Piauí

Evento: Spectroelectrochemistry of Ionic Liquids: in situ PMIRRAS of a glassy carbon/dee

Local: Auditório do DF, 16 h.

Data: 24/07/2015

Prof. Luciana Vieira (Institute for Chemistry and Technology of Materials, Graz University of Technology, Graz, Austria and
Institute of Chemistry, University of Campinas)

Deep eutectic solvents (DES) have been suggested as alternatives to classical room temperature ionic liquids (RTILs) and been used for the electrodeposition of metals. A DES/GC (GC = glassy carbon) electrode interface was investigated by infrared spectroscopy, namely polarization-modulation infrared reflection-absorption spectroscopy (PM-IRRAS). This technique allows distinguishing between chemical
information from the diffusion layer and the species adsorbed on the electrode surface. The first in situ PM-IRRAS study of an electrode reaction in an RTIL shows the very slow formation of an adsorbed solvent layer at open circuit potential (OCP). The species adsorbed on GC and their effects on zinc electrodeposition have been investigated in detail.