Warburg impedance is a concept in electrochemistry that characterizes the diffusion of ions in an electrolyte. It manifests as a frequency-dependent impedance that is often observed in electrochemical systems involving diffusion-controlled processes. In the context of catalysis, Warburg impedance is particularly relevant in the study of electrocatalysts and heterogeneous catalysis where the transport of reactants and products to and from the catalyst surface significantly influences the overall performance.
