Phys. Rev. Lett. 103, 246102 (2009) [4 pages]Hydrogen Dissociation and Spillover on Individual Isolated Palladium AtomsReceived 24 November 2008; revised 2 October 2009; published 10 December 2009 Using a combination of low-temperature scanning tunneling microscopy and density functional theory it is demonstrated how the nature of an inert host metal of an alloy can affect the thermodynamics and kinetics of a reaction pathway in a much more profound way than simply a dilution, electronic, or geometric effect. This study reveals that individual, isolated Pd atoms can promote H2 dissociation and spillover onto a Cu(111) surface, but that the same mechanism is not observed for an identical array of Pd atoms in Au(111). © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.246102
DOI:
10.1103/PhysRevLett.103.246102
PACS:
68.37.Ef, 68.35.bd, 68.43.-h, 81.05.Bx
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