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  • 1
    Digitale Medien
    Digitale Medien
    Influence of an Fe promoter on silica-supported Pt/SnO x catalysts used for low-temperature CO oxidation (1995)
    Springer
    Catalysis letters 31 (1995), S. 133-141 
    Details
    ISSN: 1572-879X
    Schlagwort(e): CO oxidation ; platinized tin oxide
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Silica-supported Pt/SnOx catalysts used for low-temperature CO oxidation have been prepared without and with an Fe promoter. Reaction studies demonstrate that the addition of the Fe promoter results in higher catalytic activity in the presence of 8 at% CO2 and a lower decay rate. Ion scattering spectroscopy (ISS) has been used to examine the outermost atomic layers of the promoted and nonpromoted catalysts before and after activation by a reductive pretreatment. The nonpromoted catalyst exhibits agglomeration of the platinized tin oxide film exposing the catalytically inactive silica support. This agglomeration does not occur when Fe is present, and a large catalytically active surface area is maintained during the reduction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00808827
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Influence of promoters on the performance of Au/MnOx and Pt/SnOx/SiO2 low-temperature CO oxidation catalysts (1996)
    Springer
    Reaction kinetics and catalysis letters 58 (1996), S. 19-26 
    Details
    ISSN: 1588-2837
    Schlagwort(e): Low-temperature CO oxidation ; promoters ; platinized tin oxide ; gold on manganese oxide
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The influence of promoters on Pt/SnOx/SiO2 and Au/MnOx low-temperature CO oxidation catalysts has been investigated under stoichiometric reaction conditions with no CO2 added to the feed gas. The performance of Pt/SnOx/SiO2 catalysts is improved significantly by the addition of 1 wt.% Fe but reduced by the addition of 5 wt.%Fe, 1 wt.% Sb, 5 wt.% Sb, 1 wt.% As, 5 wt.%As and 1.8 wt.% P. The performance of Au/MnOx is improved significantly by the addition of 1 at.% Ce but reduced by the addition of 1 at.% Co. For the catalysts and conditions examined, the Au/MnOx catalysts are superior to the Pt/SnOx/SiO2 catalysts with respect to both activity and decay characteristics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02071100
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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