Electron-stimulated production of NO sub 2 ( g ) from O sub 2 coadsorbed with NO on Pt(111)
Journal Article
·
· Journal of Chemical Physics; (USA)
- Sandia National Laboratories, Div. 1151, Albuquerque, New Mexico 87185 (USA)
Using laser resonance-enhanced ionization spectroscopy, we have detected O({sup 3}{ital P}{sub {ital J}=2,1,0}) and NO {ital X} {sup 2}{Pi}{sub 3/2,1/2} ({nu}=5) above a 6--350 eV electron beam-irradiated Pt(111) surface containing coadsorbed O{sub 2} and NO at 90 K. Both product yields have the same chemisorbed NO coverage dependence at saturation O{sub 2} precoverage as well as the same {approx}10 eV excitation threshold. We conclude that both O({sup 3}{ital P}{sub {ital J}}) and NO({nu}=5) are laser-induced photodissociation fragments of NO{sub 2}({ital g}). This is established by the observation of identical O({sup 3}{ital P}{sub 2}) and NO({nu}=5) time-of-flight distributions that correspond to NO{sub 2} desorption from the surface. The NO{sub 2}({ital g}) is probably the reaction product of a collision between an O atom (created by electron-stimulated dissociation of adsorbed O{sub 2}) and NO({ital a}). We correlate the 10 eV NO{sub 2} production threshold with the dissociative ionization of the 3{sigma}{sub {ital g}} molecular bonding orbital of O{sub 2}({ital a}).
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6255255
- Journal Information:
- Journal of Chemical Physics; (USA), Journal Name: Journal of Chemical Physics; (USA) Vol. 93:12; ISSN JCPSA; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
BEAMS
CHALCOGENIDES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISORPTION
CHEMISTRY
DECOMPOSITION
ELECTRON BEAMS
ELEMENTS
LEPTON BEAMS
METALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTICLE BEAMS
PLATINUM
PLATINUM METALS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOLYSIS
SEPARATION PROCESSES
SORPTION
SURFACES
TRANSITION ELEMENTS
YIELDS
400600* -- Radiation Chemistry
BEAMS
CHALCOGENIDES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISORPTION
CHEMISTRY
DECOMPOSITION
ELECTRON BEAMS
ELEMENTS
LEPTON BEAMS
METALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTICLE BEAMS
PLATINUM
PLATINUM METALS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOLYSIS
SEPARATION PROCESSES
SORPTION
SURFACES
TRANSITION ELEMENTS
YIELDS