UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

O(2) adsorption and dissociation on neutral, positively and negatively charged Au(n) (n = 5-79) clusters.

Roldán, A; Ricart, JM; Illas, F; Pacchioni, G; (2010) O(2) adsorption and dissociation on neutral, positively and negatively charged Au(n) (n = 5-79) clusters. Phys Chem Chem Phys , 12 (36) 10723 - 10729. 10.1039/c004110f.

Full text not available from this repository.

Abstract

The adsorption and dissociation of an O(2) molecule on gas-phase gold clusters of size varying from 5 to 79 atoms have been investigated by means of first principles density functional theory calculations. The adsorption energies and dissociation barriers have been determined for neutral, positively and negatively charged gold clusters in order to analyze in a systematic way the role of the charge on the cluster reactivity. While there is beneficial effect on O(2) activation of an extra electron on the small gold clusters (Au(5) and Au(13)), the effect is absent for positively charged clusters. The effect of the charge vanishes rapidly by increasing the cluster size and is not visible for clusters containing about 40 atoms or more. Au(38) appears to be the most reactive among the clusters considered and strong oscillations in adsorption energies and dissociation barriers are found even for clusters containing several tens of atoms like Au(38), Au(55), and Au(79).

Type:Article
Title:O(2) adsorption and dissociation on neutral, positively and negatively charged Au(n) (n = 5-79) clusters.
Location:England
DOI:10.1039/c004110f
Language:English
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

Archive Staff Only: edit this record