Abstract
The introduction of ions of group IVB elements (M IV = Ti, Zr, Hf) into Pt/SiO 2 catalysts leads to the same adsorption and catalytic effects (decrease in chemisorption of H 2 and CO, increase in activity in methanol synthesis, decrease in activity in benzene hydrogenation and ethane hydrogenolysis) as supporting the Pt on the bulk TiO 2. The results indicate that the interaction of platinum clusters of less than 10Åwith surface MIV ions is a possible reason for such effects.
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