Overall, our measurements indicate that the plasma or the species formed by the plasma do not have a significant impact on the structural properties of the Pt AE. The additional current densities in the CVs, with respect to a CV recorded in N 2 saturated 0.01 M KOH (see black curves), are therefore attributed to the reaction of the Pt AE with the species formed by the plasma in the solution, where the reaction rates depend on the product distribution and its temporal evolution in the electrolyte. When the AE is located close (1.5 cm) to the PWE, significantly different current densities arise at the AE directly after aCGDE, which are tentatively attributed to the reaction of plasma created species (H 2 , O 2 , H 2 O 2 ) with the Pt AE. In the CVs recorded right after aCGDE (step B1) and at potentials < 0.65 V RHE , a more significant negative current density is observed. Assigning these current densities to the reaction of different species with the Pt AEs is not straightforward, since the total current density is a sum of HOR current density (positive), ORR current density (negative), HPRR current density (negative) and surface redox processes. At high electrode potentials, especially 1.0 V RHE , the situation is more clear. The observed positive current density can basically only be attributed to the oxidation of H 2 O 2 , with minor contributions from the oxidation of H 2 . These positive current densities persist after multiple cycles (see Fig. ). Finally, the different behavior of the j vs. E curve in the first negative going scan of the CV recorded after aCGDE for AEs placed at different distances from the PWE suggests that the product distribution in the solution changes with the distance from the PWE. The change in current density in Fig. during the waiting time after aCGDE also implies that the product distribution changes with time.