“…109,110 Many calculated works about different ORR mechanisms on various types of active sites have been reported. [111][112][113][114] 117 They supposed that the conventional scaling relation, 2DG(OH*) = DG(O*), is suitable for nearcontinuous active sites but not perfectly applicable to singleatom sites. A different scaling relation, DG(2OH*) = DG(O*) + 1.5 eV, in which two OH* are confined to the same atom, was considered (Fig.…”