The long-time chronoamperometric current at an inlaid microband (or laminar) electrode.

ABSTRACT: In this article, we derive an approximate asymptotic analytical expression for the long-time chronoamperometric current response at an inlaid microband (or laminar) electrode. The expression is applicable when the length of the microband is much greater than the width, so that the diffusion of the electrochemical species can be regarded as two-dimensional. We extend the previously known result for the diffusion-limited current response (Aoki, K. et al. J. Electroanal. Chem. 1987, 225, 19-32 and Phillips, C.G. J. Electroanal. Chem. 1992, 333, 11-32) to accommodate quasi-reversible reactions and unequal diffusion coefficients of the oxidant and the reductant. Comparison with numerical calculations validates the analytical expression, and we demonstrate that unequal diffusion coefficients can

SUBMITTER: Bell CG 

PROVIDER: S-EPMC3574695 | biostudies-literature | 2013 Jan

REPOSITORIES: biostudies-literature