In catalysis, DFT with a single adsorbate on catalyst surfaces are usually used as a descriptor to describe the energetic trends of the catalytic system. Although this assumption has generally proven solid, 2 the electrochemical CO 2 reduction reaction, with its manifold and complex reaction pathways, 1,7,8 might benefit from considering how multiple different adsorbates on the surface interact with each other. For this reason, we decided to perform a coverage analysis of our investigated adsorbates, going from 1/9ths to 1 ML coverage on a 3x3x3 metal atom surface. While recent studies have looked at higher coverages of adsorbates, these studies only increase the coverage of a single adsorbate. Here, we mix together our 5 different adsorbates for all possible combinations and coverages, leading to more than 300 adsorbate combinations on the surface. The idea is that at high coverages, with different adsorbate-adsorbate interactions, different adsorbate combinations might be the most stable. Ag and Au might be shown to have monodentate adsorbates on the surface, and thus be shown capable of making CO as discussed in the previous section. For more details, see the "Methodology" section in the SI.