Abstract
Dynamic EIS (dEIS) is the joint use of cyclic voltammetry and electrochemical impedance spectroscopy. A method is planned for data evaluation which involves transformations yielding potential program invariant forms of certain characteristic functions. This way of calculation is illustrated by the analysis of two archetypes of electrochemical kinetics. A future task is to develop the related theories and to perform demonstration experiments aimed at establishing dEIS as a robust, general-purpose technique for characterizing electrochemical systems.
Highlights
There are two extremes of doing research
Evaluation of the charts was done by comparing coordinates of characteristic points with the related equations
Just as the old scientistclassifying joke implies, electrochemists are rarely familiar with both methods; the textbooks teach us the two methods separately and few if any connection is shown between the results of the two types of measurements. This is so, even though there exist some variants of CV and EIS which include some element of the other method (e.g., AC voltammetry or EIS measured sequentially on stepwise set potentials or harmonic analysis with large amplitude perturbations)
Summary
There are two extremes of doing research. One is the work of pioneers—breaking the ground, finding the tools, setting the rules, and showing the directions for the followers. The need for consolidation comes from new phenomena and materials and from technical advancement. This is so when classical electrochemical methods are considered. The theory on electrochemical kinetics—the subject of which are charge transfer processes affected by adsorption and transport from/to the interface—should be reshaped, enabling one to extract as much information as possible from measured data. This is, certainly, a task to deal with in the future.
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