Kinetics studies of oxidations of catechol and l-dopa as mediated by IrCl i2−6 at polymer-coated glassy carbon electrodes

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Rotating disk techniques were employed to measure the kinetics of the oxidations of catechol and l-dopa as mediated by IrCl 2− 6 at a glassy carbon rotating disk electrode coated with a mixture of two polycationic electrolytes. For both reactants the kinetic behavior matched that described by Andrieux et al. [1] for an “SR” case. Products of the cross-reaction rate constants and substrate partition coefficients derived from the data had values consistent with very similar reactivities of both substrates toward IrCl 2− 6 inside and outside of the coatings.