To identify possible reasons for the less pronounced Ru-induced lowering of the O-vacancy formation energy ∆𝐸 𝑣𝑎𝑐 at the sites 2i, 8i and 9i, we decomposed the Ru-induced change in vacancy formation energy Evac into contributions arising from changes in the interaction between the Ru nanorod and the support ( ∆𝐸 𝑅𝑢-𝑠𝑢𝑝𝑝𝑜𝑟𝑡