DFT offers great promise in advancing the understanding of the oxygen reduction reaction. The challenge, however, lies in developing a model that represents the physics of the interface, yet is not so complex that its use is prohibitive. In this talk, we will present the results of our calculations of oxygen reduction on Pt(111), in which the solution is modeled by weakly adsorbed protonated water clusters and the interfacial charge gradient modeled with homogeneous electric fields. These calculations favor a pathway in which an initial proton transfer step is followed by a dissociation step. We will then discuss how these results complement previous experimental data.