Adsorption 1 Adsorption energies 1 Density functional theory 1 Density-functional-theory 1 Errors 1 Local spin density approximation Metal ions 1 Molecules 1 Numerical methods 1 Orbitals 1 Perdew-burke-ernzerhof 1 Self-interaction corrections 1 Self-interaction error 1 Self-interactions 1 Small molecules 1 Transition metal compounds 1 Transition metal ions 1 Transition metals 1