NMR study of the chemisorption bond of carbon monoxide on platinum

Journal Article · Mon Jan 07 04:00:00 EST 1985 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.54.71· OSTI ID:5994769

Rudaz, S L; Ansermet, J; Wang, P; Slichter, a C.P.; Sinfelt, J H

The authors report /sup 13/C NMR studies of /sup 13/Co adsorbed on small Pt particles and show that the data yield quantitative information about the CO-Pt bond. They find that the /sup 13/C resonance position is shifted 200 ppm to higher frequency than in CO gas. They prove that the shift arises from polarization of the electron spins in the bond (a Knight shift) by showing that the spin-lattice relaxation obeys the Korringa law. Using ESR results from CO radicals, they deduce the local density of states of the CO 5sigma orbital on the carbon atom at the Fermi energy. The NMR also reveals diffusion of CO on the Pt surface.

• Research Organization: Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
• DOE Contract Number: AC02-76ER01198
• OSTI ID: 5994769
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 54:1; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL BONDS
CHEMICAL REACTIONS
CHEMISORPTION
DATA
DIFFUSION
ELECTRON SPIN RESONANCE
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL DENSITY
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FERMI LEVEL
INFORMATION
ISOTOPES
KNIGHT SHIFT
LIGHT NUCLEI
LOW TEMPERATURE
MAGNETIC RESONANCE
MEDIUM TEMPERATURE
METALS
NUCLEI
NUMERICAL DATA
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
RESONANCE
SEPARATION PROCESSES
SORPTION
SPIN ECHO
SPIN ORIENTATION
STABLE ISOTOPES
TRANSITION ELEMENTS