The reaction of H2 with 13CO adsorbed on Pd/Al2O3 has been investigated by solid state 13C NMR. As the reaction proceeds, the peak for adsorbed CO on the Pd particles decreases while the intensity of a new peak near 60 ppm increases. This new peak is tentatively assigned to methoxy groups. When the sample was annealed at temperatures higher than 180°C, gas phase CH4 was observed as a sharp peak near -10 ppm. The metallic character of the Pd particles was studied by observing the first moment and spin lattice relaxation time of the 13CO on Pd which changed as the reaction progressed. Proton NMR was also employed to confirm the assignment of 13C peaks as well as the presence of palladium hydride.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry