title: Hydrogen dissociation and spillover on individual isolated palladium atoms.
abstract: 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).
authors.affiliation: Department of Chemistry, Tufts University, Medford, Massachusetts 02155-5813, USA.
authors.forename: Heather L
authors.initials: HL
authors.lastname: Tierney
authors.forename: Ashleigh E
authors.initials: AE
authors.lastname: Baber
authors.forename: John R
authors.initials: JR
authors.lastname: Kitchin
authors.forename: E Charles H
authors.initials: EC
authors.lastname: Sykes