In the same line as phosphorene, the rest of the supports show a too strong interaction with the ORR intermediates, and the adsorption free energies of Pt10/2D-support deviate considerably from the ideal values. Despite having pure Pt, the oxophilic character of the supports is so strong that all intermediates, except for Pt10(OOH) on germanene and 2H-MoS2, suffer from overbinding. The most dramatic case is silicene followed by SmSI and germanene. These supports have in common that O* and OH* are both adsorbed to them instead of Pt; at 0 V (vs SHE) they already present negative adsorption free energies (e.g., ΔGO* = -1.12 eV for Pt10/silicene), suggesting that they are too oxophilic.