Evolution of Small Copper Clusters and Dissociative Chemisorption of Hydrogen
- 19 January 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 94 (2), 026103
- https://doi.org/10.1103/physrevlett.94.026103
Abstract
The structural evolution of small copper clusters of up to 15 atoms and the dissociative chemisorption of on the minimum energy clusters are studied systematically using density functional theory. The preferred copper sites for chemisorption are identified and the transition state structures and activation barriers for clusters four to nine atoms are determined and found to be inconsistent with the empirical Brønsted-Evans-Polanyi relationship. The physicochemical properties of the clusters are computed and compared with the bulk and surface values. The results indicate that a phase transition must occur in the going from cluster to bulk.
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