Another critical factor that may impact the effectiveness of regeneration is the cutoff voltage of the regeneration step itself. Figure shows that the dimer oxidation is initiated at a cell voltage of around 0.0 V. However, it is crucial to determine the minimum cutoff voltage at which dimer oxidation completes but the other species present in the negolyte remain unchanged. Unnecessarily lowering the regeneration cutoff voltage, which causes a higher oxidative potential for the negolyte, leads to the possibility of oxygen evolution reaction , and also the oxidation of the carbonaceous electrode itself . More importantly, very oxidative voltages may also result in the decomposition of the electroactive species, DHAQ in our case. As presented in Figure , applying a very negative voltage (-0.4 V) to a DHAQ Ferrocyanide cell led to forming side products in the negolyte not present in a pristine DHAQ electrolyte.