After the chronoamperometry steps (B1 and B2 or only B2), cyclic voltammetry was performed at the AE in step C (Figs. and). Overall, the evolution of current densities, especially in the first few seconds of the first cycle, strongly depends on the waiting time as well as on the position of the AE with respect to the PWE during aCGDE. These features and current density variations can be due to changes induced by the plasma or waiting time on the AE and the reaction of species from the electrolyte formed during aCGDE on the AE surface.