Characterization and Catalytic Properties of Nickel Oxioe Supported on Rare Earth Oxides. Description of the Metal — Support Interaction

Summary The activity and the selectivity of nickel are greatly modified when supported on ceria; an increase of both the activity and C 5 selectivity is obtained. The comparison of results of H 2 adsorption — TPD, (CO, H 2 ) reaction, competitive benzene and toluene nydrogenation and infra red spectra of CO irreversibly adsorbed lead to the conclusion that new catalytic sites involving reduced support are selectively formed at the metal-support interface. The increase of both the surface area and the reduction temperature significantly modify the electron transfer between support and metal (then the nature of active sites) and the repartition of these sites.