We have performed periodic density functional calculations on the adsorption of transition-metal atoms (Rh and Pd) on MgO(001) support. The chemical properties of the supported metal atoms were examined by calculating the adsorption of NO and NO2 on the metal atoms. Sampling only the k=0 wavevector point in the Brillouin zone we NO solved the one-particle 2 Schrödinger equations within the KohnÉSham framework, employing a unit cell which contained 16 surface atoms and the adsorbate particles. We have found that the interaction between the support surface and the adsorbing metal atom is stronger for Rh than Pd by 1 eV using non-local density approximation. The diference is explained by considering the endothermic reorganizations in the metal electronic structures due to the adsorption. The NO adsorption demonstrated the cationic nature of the adsorbed metal particles and showed that supported Rh atoms can form stronger bond with NO than supported Pd atoms. The NO adsorption also showed stronger RhÉN interactions and the asymmetric orientation of NO2 suggested weak additional interaction between the ligand and the support surface.
|ジャーナル||Journal of the Chemical Society - Faraday Transactions|
|出版ステータス||Published - 1997 1 1|
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