of individual O-vacancies at the same site, which was attributed to depolarization effects, or it is identical. Nevertheless, despite of these deviations, the charge transfer from the support to the Ru nanorod upon O-vacancy formation can be used as a primary indicator for the Ruinduced lowering of the energy cost for creating that O-vacancy. Note that it is not a descriptor, as this would refer to a physical property of the model before formation of the O-vacancy.