Electronic and chemical properties of Ag/Pt(111) and Cu/Pt(111) surfaces. Importance of changes in the d electron populations

Journal Article · Thu Nov 03 00:00:00 EST 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100095a004· OSTI ID:6717655

Rodriguez, J A; Kuhn, M ^[1]

---

1. Brookhaven National Lab., Upton, NY (United States)

The electronic interactions in Ag/Pt(111) and Cu/Pt(111) have been examined using X-ray photoelectron spectroscopy and ab initio MO-SCF calculations on cluster models. Ag and Cu atoms bonded to Pt(111) exhibit core-level binding energies that are smaller than those of bulk Ag or Cu. The negative core-level shifts correlate with an increase in the ability of the noble metals to adsorb CO. These electronic and chemical perturbations reflect the effects of a Pt-induced increase in the Cu 3d and Ag 4d electron populations. The behavior seen for Cu and Ag on Pt(111) is opposite to that found on early transition metals where there is a decrease in the d electron populations of Cu and Ag with positive core-level shifts for the noble metals. 44 refs., 5 figs.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6717655
• Journal Information: Journal of Physical Chemistry; (United States), Vol. 98:44; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON MONOXIDE
ADSORPTION
CATALYSTS
CHEMICAL PROPERTIES
ELECTRONIC STRUCTURE
SURFACE PROPERTIES
COPPER
INTERFACES
MATHEMATICAL MODELS
MOLECULAR ORBITAL METHOD
PLATINUM
SILVER
SOLID CLUSTERS
X-RAY SPECTROSCOPY
CALCULATION METHODS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ELEMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
SORPTION
SPECTROSCOPY
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties
661300 - Other Aspects of Physical Science- (1992-)