TITLE:
Analytical expression of non steady-state concentration profiles at planar electrode for the CE mechanism
AUTHORS:
Vincent Michael Raj Margret PonRani, Lakshmanan Rajendren
KEYWORDS:
Planar Electrode; CE Mechanism; Mathematical Modelling; Reaction/Diffusion Equation; Homotopy Perturbation Method
JOURNAL NAME:
Natural Science,
Vol.2 No.11,
November
30,
2010
ABSTRACT: The analytical solutions of the non-steady-state concentrations of species at a planar microelectrode are presented. These simple new approximate expressions of concentrations are valid for all values of time and possible values of rate constants. Analytical equations are given to describe the current when the homogeneous equilibrium position lies heavily in favour of the electroinactive species. Working surfaces are presented for the variation of limiting current with a homogeneous kinetic parameter and equilibrium constant. Moreover, in this work we employ the Homotopy perturbation method to solve the boundary value problem.