Fig. 2: Distribution of adsorption energies (left) and OCO-angles (right).

The distribution is shown for the whole dataset (black), for the top subgroups of sites with OCO < 132° angles (blue) and l(C–O) > 1.30 Å (green). The subgroups obtained with adsorption energy constraint are marked with “c.” and shown with dashed lines. The adsorption energy Eads is defined as the difference between the total energy of the slab with adsorbed CO2 and the sum of total energies of the clean slab and an isolated CO2 molecule.