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Zusammenfassung:
MCM-41 and AI-MCM-41 behave differently when subjected to impregnation, ion exchange, and equilibrium adsorption of palladium, respectively. The pore structure of the MCM 41 is strongly influenced by the preparation technique while AIMCM41 is not; however, all materials retain a high BET surface area. This was confirmed by nitrogen adsorption. It was found that introducing ligand stabilized clusters into the pores of MCM-41 does not affect the pore structure and leaves the clusters intact. The palladium catalysts prepared in this study show fairly high activities in the CO-oxidation and hydrogenation of the olefinic bond of crotonaldehyde. Platinum supported on titanium containing mesoporous materials show a higher selectivity to crotylalcohol than when deposited on pure siliceous supports, which is probably due to the SMSI effect
