Finally, it is possible to calculate the thermodynamic expected oxidation state at a given potential. To do so, we select evenly spaced points in the ∆G O vs. N O /N Pt fitting. For each of these points, we calculate the potential dependence using the CHE on a fine grid of U for each oxidized configuration. This process yields a set of linear curves representing the potential dependence for the selected systems. By finding the lowest curve in this set for multiple potential subranges, we determine the thermodynamically favored state at each potential. As a result, we obtain an oxygen ratio vs. potential curve which represents the expected oxidation state across a range of potentials. This process is carried out for both forcefield and shown in Figure . Starting at 0.7 V, oxidation steadily grows as the potential increases, which is the expected behavior and in reasonable agreement with previous studies. Our value of onset potential for oxidation is also in reasonable agreement with the one of 0.8