combines GGA exchange and LDA correlation with a non-local correlation contribution, which depends on the electron density and a non-local kernel. It is thus designed to incorporate dispersion interactions in a seamless fashion, obviating the need for elementspecific dispersion coefficients. As systematic inaccuracies were identified in the original vdW-DF approach, which uses revPBE exchange, several combinations with other exchange functionals have been proposed subsequently. In addition to the original implementation, four of these "Non-local vdW-DF1" approaches were considered in this study (Table ).