In order to assess possible coke formation via cracking on Pt4GeC2, we also computed the energetics of the C-C bond scission on relevant intermediates. A few of the pathways found are thermodynamically viable, however the kinetics render them unlikely compared to either C-H activation or desorption (Fig. ), with the exception of acetylene cracking, where the barrier remains ~ 0.3 eV higher than the lowest barrier for C-H activation.