Effects of Na on the interaction of CO with Ta(110)

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:7241242

Shek, M L; Pan, X; Strongin, M

The interaction of CO with Ta(110) at 80K proceeds by dissociative chemisorption followed by molecular adsorption. The molecular chemisorption bond strength is weak, as judged by the observation in photoemission spectra of a ''shake-up'' feature at 2.1 to 2.2 eV below the ''4sigma'' orbital. The weakly bound molecular phase continues to exist in the presence of Na predoses, apparently without appreciable adsorption bond strengthening. This molecular phase is suppressed in favor of dissociation only after predoses of approx.1.0 and approx.1.29 ML Na, when a small to moderate enhancement in CO dissociation occurs relative to the pure surface at 80K.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 7241242
• Report Number(s): BNL-38702; CONF-861019-10; ON: DE87001468
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ADSORPTION
ALKALI METALS
BINDING ENERGY
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
DISSOCIATION
ELEMENTS
ENERGY
LOW TEMPERATURE
METALS
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SODIUM
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SURFACE PROPERTIES
TANTALUM
TRANSITION ELEMENTS