Abstract

In the present work the obtention of poly-o-aminophenol (POAP) at high potentials on conducting glass (Sn0(2): F) is reported. The synthesis was carried out by continuous potential cycling in a 1 x 10-3M o-aminophenol (OAP), 0.1 M hydrochloric acid, and 0.1 M potassium chloride solution between-0.2 and 1.5 V at 0.05 V-s-1 vs Ag AgC1. The polymer growth was followed by cyclic voltammetry, UV-vis spectra, and AFM characterization. The SnO2: F modified electrode (SnO2: F/POAP) was tested in the electro-oxidation of ascorbic acid (AA) in phosphate buffer solution. This coating showed an important electrocatalytic effect because a negative anodic shift of 0.4 V with respect to abare SnO2: F glass electrode was observed.