Interaction between methane and SACs describing the charge transfer from the surface to methane molecule as reported in SI Tab. 2, could be understood from pDOS plotted with respect to vacuum and shown in Fig. . For isolated methane, C(2p) peak is sharp with the highest intensity. C(2p) peak of physisorbed methane is same in nature but with reduced intensity. C(2p) peak of chemisorbed methane is shown for two cases, the most activated one (Ru/Cu(111)) and the most stable one(Mo/Cu(111)). Not only the peak intensity decreases but also the broadening of the peak along with a secondary peak is observed in both the cases as evident from Fig. . In addition, our study revealed that the mid-transition doped SACs show more C-H bond activation. tion of about 3% -5% were selected to study dissociative adsorption (DA) of methane.