Use of electrochemical impedance spectroscopy in the analysis of the oxygen evolution reaction

Recent advances in the application of electrochemical impedance spectroscopy for analysis of the oxygen evolution reaction are discussed. Impedance is used routinely to rank catalysts, to determine the electrochemically active surface area, and for mechanistic interpretation. A significant development are attempts at assessing the electrochemically active surface area from the faradaic impedance rather than from the double-layer capacitance. Impedance is also used for assessment of Tafel slopes, but for future work better integration of microkinetic models with impedance is suggested, notably through the Tafel impedance . • •The applications of electrochemical impedance spectroscopy (EIS) for analysis of the OER is reviewed. • •EIS is an established method for evaluating Tafel slopes. • •Significant progress has been made in the use of EIS for evaluating surface areas. • •EIS has a significant potential for the extraction of kinetic parameters.