Instead of applying corrections to specific molecules, it is possible to determine correction factors for bond types. The OCO correction of Peterson et al. is a simple example, but more sophisticated approaches are possible. The usage of bond-additivity corrections to improve the accuracy of low level of theory methods is a well-established procedure in the gas-phase commu-Referencing Referencing w corr Fig. Enthalpy diagram with the relative enthalpies derived from the corrected DFT energies of CO 2 (+31.8 kJ mol -1 ) and H 2 (+8.7 kJ mol -1 ) using referencing approach compared with the ∆ A H from the uncorrected DFT energies. The enthalpy diagrams are aligned to C 2 H * 6 + CO * 2 to demonstrate that the adsorption enthalpy of CO 2 was corrected.