used rev-vdW-DF2together with several other functionalsin a study of CO2, CH4, and H2O adsorption in metal-organic frameworks (MOFs) with open metal sites. They observed excellent agreement with experimental 𝐸 𝑎𝑑𝑠 values (derived from adsorption enthalpies) and metal-guest equilibrium distances (obtained from in-situ neutron diffraction). The good performance for MOFs with positively polarised open metal sites could imply that rev-vdW-DF2 is also suitable for adsorption in cationic zeolites, where a reasonable representation of the interaction with the cations will be A good performance of this functional was also observed in DFT studies addressing the adsorption of large aromatic hydrocarbons on coinage metals, of H2 on graphene, of water on carbon nanostructures, and of benzene on gold and acetylene on sodium chloride. Finally, it is worth pointing out that the coordinates of the zeolite framework atoms were held fixed in all calculations presented here. While it is acknowledged that a full relaxation of the framework should be included in an accurate description of adsorption phenomena, it is not expected that it would result in qualitatively different findings across the set of functionals studied. As a case in point, the "deformation energy" (the change in total energy of the deformed zeolite framework in the adsorption complex with respect to the optimised guest-free state) mostly remained well below 10 kJ mol -1 (and never exceeded 12 kJ mol -1 ) in recent studies of CBZ and TCS adsorption in all-silica zeolites. Increased deformation energies for protonated zeolites show that the relaxation of the framework atoms becomes more important in studies of systems containing a negatively charged framework and chargebalancing species. The rev-vdW-DF2 functional was also found to provide good agreement with experiment when considering structural parameters of all-silica zeolites and AlPO4