Voltammetry of Nitrobenzene at Bare and DODAC Coated Pt

Abstract

The reductive electrochemistry of nitrobenzene at one concentration was examined 1:1 water-propanol mixture at bare and DODAC covered platinum semi-micro electrodes using cyclic voltammetry. Generally it is believed [1-9] that couple of reduction and oxidation peak is associated with four electron transfer process which leads to the formation of phenylhydroxylamine in neutral and alkaline solutions. During electroreduction of nitrobenzene at a certain concentration, anodic shift is observed (108 mV) on DODAC covered platinum electrode. It reveals that in the presence of cationic micelles [10-18] partition of nitrobenzene occurs where nitrobenzene is more concentrated in micellar phase than in bulk. Cathodic and anodic peak currents show almost linear trend with increasing potential sweep rate. Similar trend is observed for cathodic and anodic peak potentials, respectively.