To understand the solvation effect on the stabilization of ORR intermediates, we have calculated the solvation energy for all the methods (Figure ). The solvation energy is determined as the difference between the free energy of adsorption for an ORR intermediate at the gas phase and Next, we try to analyze the behavior of scaling relationships between the adsorption free energies of ORR intermediates as these have been largely used for understanding the ORR. Scaling relations have been widely used to understand the origin of activity and predict new catalytic systems with minimal computational efforts. The scaling relations are generally studied over a set of catalyst surfaces where the reported standard relations are ∆GO=∆GOH+2 for O vs. OH and ∆GOOH=∆GOH+3.2 for OH vs. OOH intermediates (∆G denoting adsorption free energy). Here, we attempt to check the plausibility of such a scaling relationship across different DFT methods for the Pt (111) surface. Previously, Norskov and co-workers have reported the sustainability of OH vs. OOH scaling relation across different functionals despite the systematic error, which was canceled by the inclusion of van der Waal's corrections. However, their study had not considered the effect of solvation implicitly and/or explicitly. The obtained scaling relations in both the gas phase and solvent phase for the ORR intermediates for different methods are depicted in Figure . It can be seen that there exists a reasonable correlation between ∆GOH vs. ∆GOOH in both the gas phase and the solvent phase, where it is highest for the former with a coefficient of determination value of 0.92. In both solvent and gas phases, the OH and OOH adsorption free energies are better correlated than O vs. OH, almost negligible in the solvent phase.