AEI 39 |
| Supported nanoparticle (NP) catalysts have been key players in technologies tied to energy production, utilization, and emissions abatement. Classic examples include platinum metal reforming catalysts, fuel cell catalysts, and the automotive catalytic converter. Bimetallic NP catalysts are also attracting great interest due to the wide variety of catalytic applications associated with metal alloys and clusters. However, the synthesis and characterization of mono- and bimetallic NP catalysts containing first row transition metals remains problematic. We have developed a new method for the synthesis of mono- and bimetallic dendrimer encapsulated nanoparticles (DENs) containing first row transition metals. Specifically, the encapsulation and reduction of metal salts (CuII, NiII, CoII and AuIII, and mixtures thereof) in nonaqueous solutions was explored utilizing amine terminated generation 5 PAMAM dendrimers (G5NH2) anchored to solid supports. DENs of both mono- (Au, Ni, Cu) and bi- (AuNi, AuCo, AuCu) metallic mixtures were synthesized. These NP catalysts were extracted from the dendrimer with appropriate capping ligands and deposited onto a commercial TiO2 support. The new catalysts were characterized and evaluated for low temperature (263-293 K) CO oxidation activity, which is an important process for cleaning hydrogen fuel streams for fuel cell applications. |
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Academic Employment Initiative
8:00 PM-10:00 PM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Sci-Mix
Academic Employment Initiative |