Oxide Supports for NP Catalysts

PtNPs and bimetallic dendrimer-stabilized Pd-AuNPs were adsorbed onto a high-surface silica support and thermally activated to remove the dendrimers 

The mechanisms of oxide-supported PdNP catalysis are far from being understood. The oxide support has of course a strong influence on the activity. For instance, in the Heck reaction, the activity is dominated by the support according to  

The Heck and Suzuki reactions have been catalyzed by other NPs such as RuNPs, including alumina-supported RuNPs [43c]. Hydroxyapatite-supported RuNPs were recently found to be efficient and recyclable catalysts for cis-dihydroxlahon and oxidative cleavage of alkenes [43dj. Supported RuNPs in the pores of mesoporous Al-MCM-41 materials were prepared by Hj reduchon of adsorbed [Ru(NH3),s], and the activity in benzene hydrogenabon was studied in the absence and presence of 330ppm H2S in H2. By comparison, zeolite-supported catalysts were found to be more efficient when H2S was present [43dj. 

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