Hydrogen Dissociation and Spillover on Individual Isolated Palladium Atoms

Journal Article · Fri Dec 11 00:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.246102· OSTI ID:21370903

Tierney, Heather L; Baber, Ashleigh E; Sykes, E Charles H. ^[1]; Kitchin, John R ^[2]

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1. Department of Chemistry, Tufts University, Medford, Massachusetts 02155-5813 (United States)
2. Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)

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 H{sub 2} 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).

• OSTI ID: 21370903
• Journal Information: Physical Review Letters, Vol. 103, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.103.246102; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
COPPER
DENSITY FUNCTIONAL METHOD
DISSOCIATION
GEOMETRY
GOLD
HYDROGEN
PALLADIUM
SCANNING TUNNELING MICROSCOPY
THERMODYNAMICS
CALCULATION METHODS
ELEMENTS
MATHEMATICS
METALS
MICROSCOPY
NONMETALS
PLATINUM METALS
TRANSITION ELEMENTS
VARIATIONAL METHODS