TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Analysis of the reactivity of small cobalt clusters

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut205-209
Sivumäärä5
JulkaisuZeitschrift für Physik D Atoms, Molecules and Clusters
Vuosikerta3
Numero2
DOI - pysyväislinkit
TilaJulkaistu - kesäkuuta 1986
Julkaistu ulkoisestiKyllä
OKM-julkaisutyyppiA1 Alkuperäisartikkeli

Tiivistelmä

The electronic structures of small cobalt clusters have been calculated within the local spin density approximation using the LCAO method. The calculations were done for simple geometries with the optimized number of interatomic bonds, and both for the bond length of the cobalt dimer and the bulk metal. The Fermi energy is found to be smaller for CoN clusters with N=3, 4, 5 and N>10 than for the other ones. The variation of the Fermi energy with the cluster size correlates in a striking way with the observed H2 tendency for chemisorption as found for cobalt clusters in a supersonic beam. Furthermore, the magnetic moments are somewhat smaller for these active clusters. In addition the lowest unoccupied levels of majority spin appear close to the highest occupied levels of minority spin which is not the case for the inert clusters.