An overview of this model is displayed in Fig. comparing a numerical simulation of Eq. 45c with the derived approximate relationships. Fig. show exemplary CVs at different scan rates and how the peak positions are determined. For the H-upd, the equilibrium peak positions are deduced from the symmetry of the forward and backward peak, while in the O-upd case it must be estimated from the CV at the lowest scan rate since the peak position in the backward direction depends on the amount of formed O-upd charge and hence the scan rate and upper vertex potential. We then applied Eq. 46a and found a good fit allowing the estimation of the rate constant corresponding to each feature. The coincidence between the two main H-upd features suggests the same process and rate constant. Hence, the H-upd pattern arises mainly from the distribution of binding energies, with 𝐶(𝐸) (Eq. 42a) representing the density distribution of the average binding energy per adsorbed hydrogen at any given potential 𝐸 and the activation energies independent of the site. While the rate constant of the O-upd is significantly larger than in the case of the H-upd, we cannot say if the O-upd forms through the same reactants and hence a direct comparison of rate constants forbids itself.