Opposite to Pt on phosphorene, the bridge configuration is the most stable adsorption configuration for O*, either on the Pt cluster (5-8-5-DV, gr-B and 2H-MoS2) or on the support atoms (silicene, germanene and SmSI). However, OH* follows the same atop mode as in phosphorene except for SmSI. It should also be mentioned that the adsorption modes of the oxygenated species in Pt10/2H-MoS2 are in agreement with previous studies. To our surprise, our study reveals that silicene, germane and SmSI supports provide more stable active sites for the ORR intermediates than Pt itself, owing to their pronounced oxophilicity. Among these surfaces, special attention should be drawn to the SmSI case, where OH* and O* are bonded covalently in an unusual fashion to three Sm atoms. Further analysis of the chemical bond is required.