The direct N2O decomposition catalysed by 5-coordinated transition metal io
ns Fe, Co, and Rh was studied using the DFT method. The cluster model has t
he formula M(OH)(3) (H2O)(2). Energies of intermediates and transition stat
es were computed. The results show that Co and Rh sites are more active tha
n Fe, the former two being very similar.