Journal of Electrochemical Science and Technology

The Korean Electrochemical Society (한국전기화학회)
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A Kinetic Investigation of Ethanol Oxidation on a Nickel Oxyhydroxide Electrode

  • Danaee, I. (Abadan Faculty of Petroleum Engineering, Petroleum University of Technology) ;
  • Jafarian, M. (Department of chemistry, K. N. Toosi University of Technology) ;
  • Sharafi, M. (Department of chemistry, K. N. Toosi University of Technology) ;
  • Gobal, F. (Department of chemistry, Sharif University of Technology)
  • Received : 2012.03.18
  • Accepted : 2012.03.28
  • Published : 2012.03.30
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Abstract

Nickel modified NiOOH electrodes were used for the electrocatalytic oxidation of ethanol in alkaline solutions where the methods of cyclic voltammetry (CV) and chronoamperometry (CA) were employed. In CV studies, in the presence of ethanol, an increase in the current for the oxidation of nickel hydroxide is followed by a decrease in the corresponding cathodic current. This suggests that the oxidation of ethanol is being catalysed through mediated electron transfer across the nickel hydroxide layer comprising of nickel ions of various valence states. Under the CA regime the reaction followed a Cottrellian behavior and the diffusion coefficient of ethanol was found to be $1{\times}10^7cm^2s^{-1}$.

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