Carbon-13 NMR spectroscopy study of L-zeolite- and silica-supported platinum catalysts
- Univ. of Wisconsin, Madison, WI (United States)
NMR studies of CO adsorbed on small Pt particles show evidence of changes in the metallic nature of these particles with size. Large particles on silica or the exterior of zeolite crystallites have conduction-band electrons that cause a Knight shift for adsorbed CO. Small particles in zeolite cavities are diamagnetic clusters, and yield spectra for linear and bridging carbonyls similar to those of transition-metal cluster compounds. {sup 13}C NMR of CO offers a simple probe of metal dispersion and particle size for these Pt catalysts and other noble metal systems. 29 refs., 7 figs., 2 tabs.
- OSTI ID:
- 47968
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 150; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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