• All dc-XC functionals have a systematic tendency to deliver too negative adsorption energies, with the mean of signed errors (𝑀𝑆𝐸) ranging from -3.4 kJ mol -1 for rev-vdW-DF2 to -37 kJ mol -1 for optPBE-vdW. As rev-vdW-DF2 was consistently identified as the functional delivering the least negative adsorption energies, it emerges as approach that provides best agreement with the DLPNO-CCSD(T) benchmark.