sup 13 C NMR spectroscopic characterization of CO adsorbed on supported metal catalysts

Conference · Thu Sep 01 00:00:00 EDT 1988 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)

OSTI ID:5112657

Root, T W ^[1]; Duncan, T M ^[2]; Zilm, K W ^[3]

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1. Univ. of Wisconsin, Madison (USA)
2. AT and T Bell Labs., Murray Hill, NJ (USA)
3. Yale Univ., New Haven, CT (USA)

{sup 13}C NMR spectra of CO adsorbed on silica-supported Ru and Rh provide quantitative analysis and descriptions of the three adsorbed states: linear and bridge-bonded CO on metal particles and multicarbonyls on isolated metal atoms. Wideline and magic angle sample spinning (MASS) spectra both carry information about the state of the solid sample. Static spectra allow identification of sites and quantitative determination of populations. Subspectra linewidths indicate that CO on particles is immobile, while the multicarbonyl species is averaged by motion or exchange through the gas phase. MASS shows isotropic shifts consistent with linear and multi-carbonyl sites, but does not show a peak corresponding to the bridged species assigned above. The authors interpret this as an indication that variation among the bridged CO gives inhomogeneous broadening which precludes averaging to a narrow peak during MASS.

• OSTI ID: 5112657
• Report Number(s): CONF-880939--
• Journal Information: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA), Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA) Vol. 33:4; ISSN 0569-3799; ISSN ACPCA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON MONOXIDE
CARBON OXIDES
CARBONYLS
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ANALYSIS
DATA
ELEMENTS
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
METALS
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PLATINUM METALS
QUANTITATIVE CHEMICAL ANALYSIS
RESONANCE
RHODIUM
RUTHENIUM
SORPTION
SPECTRA
STABLE ISOTOPES
TRANSITION ELEMENTS