“…The second peak is characterized by a very steep slope, which is analogous to the voltage plateau following the dip in the galvanostatic data. Since a change of the aggregate state is again necessary here, nucleation must start first; as soon as this has happened, the entire material is converted in a narrow potential window, i. e. in a short period of a CV, but over a long time under galvanostatic conditions [39] . During the reduction, our measurements show that a smaller third peak occurs at 2.12 V, especially in cells with Cr 2 O 3 .…”