The ORR intermediate complexes reach different GM after alloying with Ge. As is evidenced in Figure , Ge introduces alternative oxophilic sites which are in competition with the support sites such as Si and Sm. A change of adsorption from end on to bridge mode is observed for OOH* in P5Ge5(OOH)/ In the following, we carry out a comparison of the ORR thermodynamics. The free energy diagrams are collected in Figures in 9b and 10b. As in phosphorene, at 0 V (vs SHE), the adsorption free energies of all intermediates are more stable with respect to the experimental standard ORR reaction potential of 4.92 eV. In these supports OOH* dissociates spontaneously in a very exergonic process and hence, we decided to focus only on the dissociated mechanism.