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Title: Numerical modelling and simulation of Koutecky-Levich equation for NADH electrocatalytic oxidation at graphite electrodes modified with a new polymeric phenothiazine
Authors: Unguresan, Mihaela Ligia
Gligor, Delia Maria
Keywords: Electrochemistry;Modified electrodes;Polymers;Electrocatalytic oxidations;Oxidations;Koutecky-Levich approach;Polyphenothiazine
Issue Date: Feb-2009
Publisher: CSIR
Abstract: A mathematical model has been developed for the electrocatalytic NADH oxidation process taking place at graphite electrodes modified with a polymer of phenothiazine formaldehyde. The electrocatalytic rate constants (kobs) have been obtained from rotating disk electrode experiments, at various concentrations of NADH and pH values of the supporting electrolyte. Using the method of linear regression, the kinetic parameters kobs[NADH]₌₀, k₊₂ and KM have been determined. Based on the results obtained, the numerical simulation of these parameters corresponding to electrocatalytic oxidation of NADH, using the modified graphite electrode, has been obtained. The experimental data overlap almost perfectly with the mathematical and numerical simulated data, proving the validity of the model.
Page(s): 206-210
ISSN: 0376-4710
Appears in Collections:IJC-A Vol.48A(02) [February 2009]

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