Although CO can adsorb in many configurations, RMG does not yet have coverage dependence or site specificity and must represent each species using a chemical graph to represent the Lewis structure. Because Pt(111) is used as the reference surface, where CO adsorbs to the top site via the carbon atom, we represent CO with a double bond from the metal to carbon and, because of the high simulation temperatures, the van der Waals adsorption was manually removed from the mechanism. The complete mechanism is provided in the Supporting Information and reference 58. Figure shows the comparison of simulation results with experimental results on rhodium.