Probing the surface of a heterogeneous catalyst: double resonance of carbon monoxide chemisorbed on highly dispersed platinum
Technical Report
·
OSTI ID:5414335
Spin Echo Double Resonance (SEDOR) is observed at 77K for small Pt particles on which /sup 13/CO was chemisorbed. The samples are Pt supported on eta-alumina with Pt dispersions (fraction of the atoms that are on the surface) of 26% and 76%. After cleaning, the samples are exposed to CO enriched to 90% /sup 13/C. The /sup 13/C NMR is observed indirectly through its effect on the /sup 195/Pt spin echo. SEDOR allows the NMR of the surface /sup 195/Pt nuclei to be observed underneath the resonance of the nonsurface nuclei from which the surface nuclei are ordinarily unresolved. The position (1.096 kG/MHz) and width (500 G at 80 kG) of the /sup 195/Pt SEDOR signal confirms the assignment by Rhodes et al. of a peak in the /sup 195/Pt NMR line shapes to the surface layer of platinum atoms. No surface nuclei are detected at any other locations in the /sup 195/Pt NMR line shape.
- Research Organization:
- Illinois Univ., Urbana (USA). Graduate Coll.
- DOE Contract Number:
- AC02-76ER01198
- OSTI ID:
- 5414335
- Report Number(s):
- DOE/ER/01198-1376; ON: DE82011958
- Country of Publication:
- United States
- Language:
- English
Similar Records
Probe of the surface of a heterogeneous catalyst: Double NMR of carbon monoxide chemisorbed on highly dispersed platinum
NMR of platinum catalysts: Double NMR of chemisorbed carbon monoxide and a model for the platinum NMR line shape
/sup 13/C nuclear magnetic resonance of carbon monoxide on platinum: study of a highly dispersed catalyst
Journal Article
·
Mon Aug 09 00:00:00 EDT 1982
· Phys. Rev. Lett.; (United States)
·
OSTI ID:6721773
NMR of platinum catalysts: Double NMR of chemisorbed carbon monoxide and a model for the platinum NMR line shape
Journal Article
·
Wed May 01 00:00:00 EDT 1985
· Physical Review (Section) B: Solid State; (USA)
·
OSTI ID:5097825
/sup 13/C nuclear magnetic resonance of carbon monoxide on platinum: study of a highly dispersed catalyst
Thesis/Dissertation
·
Sat Dec 31 23:00:00 EST 1983
·
OSTI ID:7046733
Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
ELEMENTS
MAGNETIC RESONANCE
METALS
NUCLEAR MAGNETIC RESONANCE
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
RESONANCE
SORPTIVE PROPERTIES
SPIN ECHO
SURFACE PROPERTIES
TRANSITION ELEMENTS
360104* -- Metals & Alloys-- Physical Properties
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
ELEMENTS
MAGNETIC RESONANCE
METALS
NUCLEAR MAGNETIC RESONANCE
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
RESONANCE
SORPTIVE PROPERTIES
SPIN ECHO
SURFACE PROPERTIES
TRANSITION ELEMENTS