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  Palladium-platinum powder catalysts manufactured by colloid synthesis I. Preparation and characterization

Veisz, B., Tóth, L., Teschner, D., Paál, Z., Győrffy, N., Wild, U., et al. (2005). Palladium-platinum powder catalysts manufactured by colloid synthesis I. Preparation and characterization. Journal of Molecular Catalysis A, 238(1-2), 56-62. doi:10.1016/j.molcata.2005.04.064.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-0A45-A Version Permalink: https://hdl.handle.net/21.11116/0000-0006-39A3-2
Genre: Journal Article

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 Creators:
Veisz, Bernadett, Author
Tóth, Lajos, Author
Teschner, Detre1, Author           
Paál, Zoltán, Author
Győrffy, Nóra, Author
Wild, Ute1, Author           
Schlögl, Robert1, Author           
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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Free keywords: Palladium–platinum; Powder catalysts; Colloidal particles Palladium-platinum bimetallic catalysts
 Abstract: 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.

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Language(s): eng - English
 Dates: 2005
 Publication Status: Issued
 Pages: -
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 Rev. Type: Peer
 Identifiers: eDoc: 248745
DOI: 10.1016/j.molcata.2005.04.064
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Title: Journal of Molecular Catalysis A
Source Genre: Journal
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Pages: - Volume / Issue: 238 (1-2) Sequence Number: - Start / End Page: 56 - 62 Identifier: -