the general widening of the potential window linearly increases the degradation rate of Pt-Co NPs in the following order: 0.7-0.925 VRHE < 0.7-1.0 VRHE < 0.6-0.925 VRHE, 0.6-1.0 VRHE, 0.4-1.0 VRHE. Further widening of the potential window (0.4-1.2 VRHE), however, results in exponential growth of the degradation rate. An additional explanation has been provided in the following paper by Gatalo et al. where it has been clearly shown that in addition to the UPL, LPL also strongly affects the metal dissolution of the state-of-the-art carbon which is crucial for the PEMFC longevity. All these findings serve as a good indicator that adjusting the potential/voltage window (in a half-cell/MEA, respectively) can have severe implications on the long-term stability of Pt-alloy electrocatalysts.