Surface Diffusion of CO on silica-supported Ru particles: sup 13 C NMR studies.
01 January 1990
Portions of CO adsorbed on Ru particles, selected by the orientation of the CO bond to an external magnetic field, are labeled by inversion of the sup 13 C nuclear magnetic dipole. Changes in the orientation of the CO bond of these labeled molecules are then observed with sup 13 C NMR spectroscopy. The temperature dependence and rate of reorientation are consistent with surface diffusion on Ru particles with small numbers of flat faces. The insensitivity to CO pressure in the range 0.5 to 100 Torr discounts simulated desorption by gas phase CO.