INOR 640 |
| Supported Pt nanoparticle catalysts are prone to CO poisoning; however, bimetallic catalysts can reduce poisoning, especially in intermetallic compounds. Traditional methods for preparing supported bimetallic catalyst can yield intermetallics by high-temperature annealing, but aggregation occurs and decreases surface area. Nanocrystalline Pt was converted into intermetallic compounds of BiPt, PbPt, PtSn and PtSb at low temperatures in a metal salt solution. FePt alloys were formed from Pt nanocrystals in solution and annealed to form intermetallic FePt3. This low temperature solution method was used to convert supported Pt into supported intermetallic PtSn, PbPt, PtSb and a Cu3Pt alloy. These nanocrystals were supported on Al2O3, CeO2, graphite and Vulcan XC-72 and aggregation was minimized due to low temperatures. Supported intermetallic PtSn/graphite was also converted to Pt3Sn/graphite. These catalysts were characterized by XRD, TEM, SAED, XPS, and electrocatalysis studies are in progress and will be discussed. |
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Nanoscience: Synthesis and Characterization
7:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Inorganic Chemistry |