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Showing 1 to 6 of 6 for “"CO chemisorbed"”.
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A new approach to the study of surface phenomena, measurements of diffusion rates, intermolecular distances and electronic properties of CO chemisorbed on supported platinum catalysts by nuclear magnetic resonance
… magnetic resonance to study the chemisorption of CO on supported platinum particles. The particles are 10 to 50 Ansgtrom in diameter, supported on alumina. CO is 90% enriched with 13CO. NMR data were taken from 4 K to 600 K. He shows that a measurement of transverse relaxation at 77 K can be used …
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Nuclear magnetic resonance study of the bonding of carbon monoxide to palladium and platinum surfaces
The 13c and 17o NMR of CO chemisorbed on small particles of Pd and Pt has been observed. The 17o resonance represents the first reported NMR observation of a spin larger than 1/2 adsorbed on a metal surface. At low temperatures, the 13c resonance of CO on Pd is centered at 540 ppm down field from …
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Nuclear Magnetic Resonance Study of the Bonding of Carbon-Monoxide to Palladium and Platinum Surfaces (Nmr)
The ('13)C and ('17)O NMR of CO chemisorbed on small particles of Pd and Pt has been observed. The ('17)O resonance represents the first reported NMR observation of a spin larger than 1/2 adsorbed on a metal surface.
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Synthesis and Characterization of Platinum-Based Fuel Cell Catalysts
… 0.4--0.5, displaying twice the activity of the commercial Pt-Ru alloy catalyst. COs adsorbed on these Pt/Ru nanoparticle consisted of two domains: CO on Pt domains behaved like CO on pure Pt while CO near Ru islands had highly shifted 13C NMR resonances, weaker Korringa relaxation, and thermal …
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13C-nuclear-magnetic-resonance of carbon monoxide on platinum: Study of a highly dispersed catalyst
… times Tl and spin-spin relaxation times T2 of CO chemisorbed on the surface layer of small particles of Pt metal have been observed by the method of spin echoes as a function of magnetic field, temperature, CO coverage and Pt dispersion. The samples are industrial catalysts: Pt supported on …
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Carbon-13 - Nuclear - Magnetic - Resonance of Carbon Monoxide on Platinum: Study of a Highly Dispersed Catalyst (Nmr)
… T(,1) and spin-spin relaxation times T(,2) of CO chemisorbed on the surface layer of small particles of Pt metal have been observed by the method of spin echoes as a function of magnetic field, temperature, CO coverage and Pt dispersion. The samples are industrial catalysts: Pt supported on …