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The response of an electrochemical reacting system to potential perturbations during electrochemical impedance spectrum measurement is investigated using numerical simulation. Electrochemical metal dissolution via an adsorbed intermediate species is analyzed and it is shown that applying the potential perturbation causes the average surface coverage to drift. For high frequency perturbations, the...
The electrochemical impedance spectra (EIS) of nonlinear and unstable electrochemical systems are numerically simulated. The effects of linear and exponential potential drifts on the EIS of anodic dissolution are examined. For direct dissolution, the numerical results are compared with the analytical solutions. For the case of dissolution via an adsorbed intermediate, Langmuir and Frumkin adsorption...
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