Collect. Czech. Chem. Commun. 1993, 58, 2695-2700

FEM Study CO and H2 Interaction with a Supported Bimetallic Catalyst: Mo-Pd/Al2O3/W

Jan Šotola and Zlatko Knor

J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, 182 23 Prague 8, Czech Republic


Palladium and molybdenum were deposited onto a continuous layer of Al2O3 covering a tungsten field emitter. The adsorption of CO at 300 K on such a model system shows unexpected increase in the electron emission from both metals. This effect can either be understood in terms of a resonance enhancement of electron tunneling, or it can result from specific interactions of CO with supported clusters as compared to CO interaction with bulk metals. Coadsorption of CO and H2 on the mixed molybdenum and palladium surface exhibits features different from coadsorption on the individual metals.