The Gibbs free energy changes (∆G) associated with all the elementary steps in the considered reaction network across all the methods is represented as a heat map in Figure . and rPW86 methods can be correlated with the high *OH stabilization via solvation effect identified for these methods. It is to be noted that the notion of limiting step is important for electrochemical steps as they become more energetically uphill when the external potential is applied. In contrast, the O2 adsorption and dissociation steps that are found to be least favorable for PBE, RPBE methods with and without dispersion considerations would not be varying under applied potential. It can be seen that the most facile pathway for all the methods is *OOH reduction, in which *OH_S1→*+H2O turns out to be the rate-limiting step except for PBE where *O_S1+*OH_S1→*OH_S1+*OH_S2 is the rate-limiting step. The congruence of the majority of DFT methods predicting *OH protonation as the limiting step with the experimental report is a noteworthy observation. The same step is also found as the rate-limiting step in all the considered pathways for the RPBE-D3 method but associated with a higher thermodynamic energy barrier.