Abstract
ABSTRACT: Nickel modified NiOOH electrodes were used for the electrocatalytic oxidation of ethanol in alka-line solutions where the methods of cyclic voltammetry (CV) and chronoamperometry (CA) wereemployed. In CV studies, in the presence of ethanol, an increase in the current for the oxidationof nickel hydroxide is followed by a decrease in the corresponding cathodic current. This suggeststhat the oxidation of ethanol is being catalysed through mediated electron transfer across the nickelhydroxide layer comprising of nickel ions of various valence states. Under the CA regime thereaction followed a Cottrellian behavior and the diffusion coefficient of ethanol was found to be1 × 10 7 cm 2 s −1 . Keywords: Ethanol, Electrocatalytic, Nickel, Modified electrode Received March 18, 2012 : Accepted March 28, 2012 1. Introduction In the past decades, the direct methanol fuel cell(DMFC) has drawn attention for its simple construc-tion with reduced dimensions and high-energy effi-ciency. Progress has been made in this field.
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