Theory and application of potential-step transmission chronoabsorptometry of long-pathlength spectroelectrochemical cells: single reversible electrode reaction

Theory of chronoabsorptometry of a single reversible electrode reaction after a potential-step perturbation using a long-pathlength spectroelectrochemical cell is presented. Assuming that the oxidized species is the only absorber at the monitored wavelength, three cases, thin-layer diffusion for Red⇄OX+ ne and semiinfinite diffusion for Ox+ ne⇄Red and Red⇄Ox+ ne, are examined by computation of the analytical solutions or digital simulation. All the theoretical results are verified by experiments