1) one chronoamperometric run at the anodic potential (E an ) for 1s, 2) cathodic chronoamperometric (E ca ) for 1s, and 3) 899 loops of 1) and 2). The pulsing anodic potential in our study was varied between -0.4 V to 0.4 V, with a 0.2 V interval. This range of potentials was selected based our analysis, which presents in the paper. Next, the cathodic reduction time and anodic time was varied to 2s, to test the influence of the anodic-cathodic time ratio.