Application of electrochemical impedance spectroscopy to the study of surface processes

Abstract

The application of Electrochemical Impedance Spectroscopy to the study of surface electrode processes is reviewed. The impedance expressions and the physical meaning of the parameters included in them are shown for three surface processes: adsorption kinetics, diffusion towards partially blocked electrodes and surface confined redox reactions. The models are applied to selected examples, showing the capability of Electrochemical Impedance Spectroscopy to obtain fundamental kinetic information of these processes. A review with 83 references.

Thin film-modified electrodes: a model for the charge transfer resistance in electrochemical impedance spectroscopy

“…Equation (14) shows that the measured R CT not only reflects k 0 and α as expected for an electrode reaction controlled by Butler-Volmer kinetics but also the values of K i and D i,f . In order to explore these dependencies, we consider the wellestablished equivalent circuit given in Fig.…”

“…Alternatively, second, the modifying film is not electroactive, and redox species must transfer from the solution through the film in order to react electrochemically at the electrode surface [10]. This paper is concerned with this second type of modified electrode from the perspective of its charge transfer resistance as might be measured using electrochemical impedance spectroscopy [11][12][13][14]. There is an extensive literature utilizing the impedance spectroscopy method to investigate modified electrode polymers [15][16][17], and also, it is a popular method of investigating selfassembled monolayers in general, for example, such as those modifying monolayer films of thiols adsorbed on gold of silver [18] or organophosphonic acids on indium tin oxide substrate [19].…”

Crystal Structure‐ and Morphology‐Driven Electrochemistry of Iron Oxide Nanoparticles in Hydrogen Peroxide Detection

“…EIS technique was used for the characterization of glassy carbon electrodes (GCEs) modified with different morphologies of iron oxide nanoparticles. Usually, this method uses a small‐amplitude perturbation signal, which makes it an excellent tool for indicating a change in the electric properties of the layers deposited on the surface of the electrode or obtaining the information about the electrons transport mechanism and reaction characteristic of electrode interface . Before data fitting, the quality of impedance data was evaluated with the Kramers–Kronig (K–K) module, which is available as an analytical tool in Autolab NOVA software, assuming its operation as reported elsewhere .…”

Effective Surface Area of Electrochemical Sensors

“…The optimum methods for measurements with nanostructured electrodes are high frequency AC polarography and electrochemical impedance spectroscopy where signals are measured with time resolution better than 100 μs, or to methods where a 100 nm thick layer is affected by convection or adsorption methods. 25,29 List of symbols…”