Cyclic voltammograms recorded on the AEs placed at different distances from the PWE, after aCGDE and subsequent waiting time at 1.0 V RHE (steps B1 and B2) are shown in Fig. . The CV recorded on an AE close to the PWE (red curve) is almost identical to the green curve (obtained without applying aCGDE). On the other hand, if the AE is placed further away from the PWE (blue curve), the size of the reduction peak in the first negative going scan is larger and shifted to more negative potentials (0.65 V RHE ) compared to the red and green curves. This implies that the electrode is significantly more oxidized. As mentioned above, such an effect would be expected for longer waiting times or if the upper potential limit was higher (see Fig. and more details below).