SYSTEMS PREPARED BY REDUCTION OF NIO SIO2-MO2 (M = TI, ZR, AND CE) - PECULIARITIES OF O-2 AND H-2 INTERACTION WITH NI CRYSTALS AND CHANGES IN SURFACE MAGNETIC-PROPERTIES AND CATALYTIC ACTIVITY/

Catalysts were prepared by reducing ternary oxide systems NiO/SiO2-MO2 (where M = Ti, Zr, and Ce) synthesized by the alkoxide method, and th eir surface and catalytic (benzene hydrogenation) properties were inve stigated. The effect of SMSI on the increase of reduction temperature was revealed as: (1) a rise in the fraction of reactive chemisorbed ox ygenic species capable of interacting with H-2; (2) a decrease of surf ace magnetic susceptibility changes upon O2 chemisorption; and (3) a s harp drop in catalytic activity. The increase in the reduction tempera ture did not affect the bonding energy or the quantity of H-2 chemisor bed.