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  • 1
    Electronic Resource
    Electronic Resource
    Pt-Sn/Al2O3 sol-gel catalysts: Metallic phase characterization (1993)
    Springer
    Catalysis letters 21 (1993), S. 309-320 
    Details
    ISSN: 1572-879X
    Keywords: Sol-gel catalysts ; platinum-tin catalysts ; platinum dispersion ; X-ray diffraction ; energy dispersive X-ray analysis ; EDX analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Highly dispersed platinum was found in Pt-Sn/Al2O3 catalysts prepared by the sol-gel method, i.e., cogelation of aluminum tri-sec-butoxide and tetrabutyltin and subsequent impregnation with hexachloroplatinic acid. X-ray diffraction studies showed that the cell parameter of pure platinum is not modified in bimetallic Pt-Sn samples. Moreover, energy dispersive X-ray analysis studies (EDX) showed that platinum, but not tin, was detected in the catalysts where tin was incorporated by the sol-gel coprecipitation of tin and aluminum. Incorporation of tin into the alumina network is suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00769483
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal Stability of Sol-Gel Hydrotalcites (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 437-442 
    Details
    ISSN: 1573-4846
    Keywords: sol-gel hydrotalcites ; X-ray diffraction ; aluminum precursors ; hydrotalcites Mg/Al ratio ; mixed metal hydroxides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Sol-Gel Hydrotalcites were synthesized using magnesium ethoxide and variable aluminum sources: aluminum acetilacetonate, aluminum chloride, aluminum nitrate and aluminum sulfate; in all cases, the gelation was done at pH 10. X-ray diffraction studies show that the crystallinity depends on the aluminum precursor used. The crystallinity was found in the order aluminum acetylcetonate 〉 aluminum chloride 〉 aluminum nitrate 〉 aluminum sulfate. The precursor determines the sintering behavior as well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018309420745
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of Tin Precursor on the Catalytic Properties of Pt-Sn/Al2O3 Sol-Gel Prepared Catalysts (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 847-849 
    Details
    ISSN: 1573-4846
    Keywords: platinum-tin catalysts ; Pt-Sn sol-gel catalysts ; cyclohexane dehydrogenation ; n-hexane conversion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Tin-alumina supports were prepared by cogelation of aluminum tri-sec-butoxide and tetrabutyltin or tin tetrachloride. Aqueous or acetone platinum solutions were used for impregnation. The results show that the specific surface area and the acidity of the catalysts were only slightly modified by the metal precursors used. On cyclohexane dehydrogenation and n-hexane conversion, high selectivity to olefins and low cracking products were detected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018362813843
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  • 4
    Electronic Resource
    Electronic Resource
    Thermal stability of sol-gel hydrotalcites (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 437-442 
    Details
    ISSN: 1573-4846
    Keywords: sol-gel hydrotalcites ; X-ray diffraction ; aluminum precursors ; hydrotalcites Mg/Al ratio ; mixed metal hydroxides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Sol-Gel Hydrotalcites were synthesized using magnesium ethoxide and variable aluminum sources: aluminum acetilacetonate, aluminum chloride, aluminum nitrate and aluminum sulfate; in all cases, the gelation was done at pH 10. X-ray diffraction studies show that the crystallinity depends on the aluminum precursor used. The crystallinity was found in the order aluminum acetylcetonate〉aluminum chloride〉aluminum nitrate〉aluminum sulfate. The precursor determines the sintering behavior as well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02436879
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of tin precursor on the catalytic properties of Pt-Sn/Al2O3 sol-gel prepared catalysts (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 847-849 
    Details
    ISSN: 1573-4846
    Keywords: platinum-tin catalysts ; Pt-Sn sol-gel catalysts ; cyclohexane dehydrogenation ; n-hexane conversion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Tin-alumina supports were prepared by cogelation of aluminum tri-sec-butoxide and tetrabutyltin or tin tetrachloride. Aqueous or acetone platinum solutions were used for impregnation. The results show that the specific surface area and the acidity of the catalysts were only slightly modified by the metal precursors used. On cyclohexane dehydrogenation andn-hexane conversion, high selectivity to olefins and low cracking products were detected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02436949
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