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          Institute: Fritz-Haber-Institut     Collection: Inorganic Chemistry     Display Documents



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ID: 248745.1, Fritz-Haber-Institut / Inorganic Chemistry
Palladium-platinum powder catalysts manufactured by colloid synthesis
I. Preparation and characterization
Authors:Veisz, Bernadett; Tóth, Lajos; Teschner, Detre; Paál, Zoltán; Győrffy, Nóra; Wild, Ute; Schlögl, Robert
Language:English
Research Context:Palladium-platinum bimetallic catalysts
Date of Publication (YYYY-MM-DD):2005
Title of Journal:Journal of Molecular Catalysis A
Volume:238
Issue / Number:1-2
Start Page:56
End Page:62
Copyright:Elsevier
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Palladium, platinum and PdPt bimetallic colloidal particles were prepared in atomic ratios of 4:1, 1:1 and 1:4 by the reduction of K2PdCl4 and/orK2PtCl4 in the presence of cationic surfactant, tetradecyltrimethylammonium bromide (C14TABr). The nanoparticles in the “as prepared” state were characterized by TEM, EDS and XPS, UPS, permitting to determine their mean particle size, bulk and surface composition. The bulk composition of the bimetallic samples determined by EDS was close to their nominal value, while XPS indicated Pt enrichment near to the surface. All samples in the “as received” state contained surface oxide impurity and contained carbon impurities. The monometallic
samples contained considerably more C as the bimetallic ones. A quasi-in situ H2 treatment at 473K in the electron spectrometer resulted in cleaner metals, containing less carbon and oxygen, as shown by XPS and UPS.
Free Keywords:Palladium–platinum; Powder catalysts; Colloidal particles
External Publication Status:published
Document Type:Article
Communicated by:Robert Schlögl
Affiliations:Fritz-Haber-Institut/Inorganic Chemistry/Surface Analysis
Fritz-Haber-Institut/Inorganic Chemistry/Inorganic Chemistry
External Affiliations:Department of Colloid Chemistry, University of Szeged
Institute of Isotope and Surface Chemistry, Hungarian Academy of Sciences
Research Institute for Technical Physics and Material Science, Hungarian Academy of Sciences,
Identifiers:URL:http://www.sciencedirect.com/science?_ob=MImg&_ima... [only for subscriber]
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