This includes COad coverage effects, e.g., due to interactions between COad molecules adsorbed at higher local coverages, both on small Ptx ensembles and also on larger ensembles. As an extreme case, this also includes the formation of multicarbonyls, where more than 1 COad is adsorbed per active (Pt) surface atom. Furthermore, we will explore proximity effects, i.e., interactions between COad on ensembles that are separated from each other by at least one Ag atom. In addition to the adsorption energies we also evaluated the adsorption geometry of the COad species for additional structural information. Hence, this work expands on our previous study where we had focused on low-coverage CO adsorption on PtAg/Pt(111) bimetallic surfaces.