Coexistence of atomic and molecular chemisorption states: H-2/Pd(210) - art. no. 096103

Citation
Pk. Schmidt et al., Coexistence of atomic and molecular chemisorption states: H-2/Pd(210) - art. no. 096103, PHYS REV L, 8709(9), 2001, pp. 6103
Citations number
23
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
8709
Issue
9
Year of publication
2001
Database
ISI
SICI code
0031-9007(20010827)8709:9<6103:COAAMC>2.0.ZU;2-4
Abstract
A novel H-2 molecular adsorption state on metal surfaces has been detected by temperature-programmed desorption and electron energy loss spectroscopy experiments of the H-2/Pd(210) system. The molecular nature of this state h as been verified by isotope exchange experiments. This molecular state lead s to a decrease of the surface work function while atomic hydrogen on Pd(21 0) causes an increase. Ab initio total-energy calculations have confirmed a ll experimental findings. Through these calculations the microscopic nature of this novel molecular adsorption state could be identified; it turns out that this state is stabilized by the presence of atomic hydrogen on the Pd (210) surface.