Characterization for EIS of a Modified Graphite Electrode in a Hexane/CTAB- (CTA)₄[Fe(CN)₆]-Butanol/Water Microemultion

Abstract

The present work show the results of the characterization of the hexane/CTAB-(CTA)4[Fe(CN)6]-butanol/water system by electrochemical impedance spectroscopy (EIS). This system has the singularity to form an adsorbed surfactant layer on the graphite surface that modifies the electrode properties. The modified electrode has been applied in Fe(CN)6-3 standard solution. Ferrocyanide molecules spread it out presumably through the adsorbed CTAB's tails even catching up with the surface of the carbon electrode, exposing an electrochemical answer of oxide-reduction. The electrochemical answer system uses a series of elements harbored the equivalent circuit agrees with the transit of ions through the adsorbed tensoactive, the range of the errors during the adjustment is small, therefore the data remains reliable; according to the Kramers-Kronig transformed (to the one were the simulations gotten out).