O sub 2 chemisorption on CoO(100): A resonant-photoemission study
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Surface Science Laboratory, Department of Applied Physics, Yale University, New Haven, Connecticut (USA)
The changes in the electronic structure of reduced single-crystal CoO(100) surfaces upon exposure to O{sub 2} have been studied by means of resonant photoemission with use of synchrotron radiation. O-vacancy point defects on CoO(100) interact strongly with O{sub 2} at room temperature. Ultraviolet photoemission difference spectra of the valence-band region taken before and after 10{sup 3} L of O{sub 2} exposure (1 L==10{sup {minus}6} Torr sec) exhibit predominantly a 3{ital d}{sup 6}-like final-state resonant behavior, which results from changes in substrate electronic structure arising from the reestablishment of Co-O ionic bonding on the surface upon O{sub 2} exposure. Although most of the O{sub 2} is believed to chemisorb as O{sup 2{minus}}, other adsorbed oxygen species are also present.
- DOE Contract Number:
- FG02-87ER13773; AC02-76CH00016
- OSTI ID:
- 5277960
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:7; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
BREMSSTRAHLUNG
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
COBALT COMPOUNDS
COBALT OXIDES
COUPLING
CRYSTAL DEFECTS
CRYSTAL FACES
CRYSTAL STRUCTURE
CRYSTALS
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
MEDIUM TEMPERATURE
MODULATION
MONOCRYSTALS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOEMISSION
POINT DEFECTS
PROBES
RADIATIONS
RESONANCE
SECONDARY EMISSION
SEPARATION PROCESSES
SORPTION
SYNCHROTRON RADIATION
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
BREMSSTRAHLUNG
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
COBALT COMPOUNDS
COBALT OXIDES
COUPLING
CRYSTAL DEFECTS
CRYSTAL FACES
CRYSTAL STRUCTURE
CRYSTALS
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
MEDIUM TEMPERATURE
MODULATION
MONOCRYSTALS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOEMISSION
POINT DEFECTS
PROBES
RADIATIONS
RESONANCE
SECONDARY EMISSION
SEPARATION PROCESSES
SORPTION
SYNCHROTRON RADIATION
TRANSITION ELEMENT COMPOUNDS
VARIATIONS