Synchrotron photoemission study of CO chemisorption on Cr(110)
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
Angle-integrated ultraviolet photoemission studies of carbon monoxide chemisorption on Cr(110) confirm the sequential population of two electronically inequivalent molecular binding states (..cap alpha../sub 1//sub -/CO and ..cap alpha../sub 2//sub -/CO) at 90 K. These are distinguished by differences in the CO 4sigma binding energies (..delta..E/sub B/ = 0.8 eV) and photoemission cross sections. Work-function measurements indicate that the surface dipole moment associated with ..cap alpha../sub 1/-CO is significantly less than that for ..cap alpha../sub 2/-CO. CO/O interaction data exhibit oxygen-induced ..cap alpha../sub 1/-CO site blocking and ..cap alpha../sub 1//sub -/CO..--> cap alpha../sub 2/-CO binding mode conversion. These results support current models for the CO binding geometries on Cr(110) and related binding states on Fe (100) and Mo(100).
- Research Organization:
- Surface Science Division, National Institute of Science and Technology, Gaithersburg, Maryland 20899
- OSTI ID:
- 6886508
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:17; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
BINDING ENERGY
BREMSSTRAHLUNG
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
CHROMIUM
CROSS SECTIONS
CRYSTALS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
FUNCTIONS
LOW TEMPERATURE
METALS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
SYNCHROTRON RADIATION
TRANSITION ELEMENTS
ULTRAVIOLET RADIATION
WORK FUNCTIONS
400201* -- Chemical & Physicochemical Properties
BINDING ENERGY
BREMSSTRAHLUNG
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
CHROMIUM
CROSS SECTIONS
CRYSTALS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
FUNCTIONS
LOW TEMPERATURE
METALS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
SYNCHROTRON RADIATION
TRANSITION ELEMENTS
ULTRAVIOLET RADIATION
WORK FUNCTIONS