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    Springer
    Catalysis letters 29 (1994), S. 349-359 
    ISSN: 1572-879X
    Keywords: pyridine adsorption ; sulfated zirconia ; infrared ; acid sites
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Pyridine adsorption on sulfated zirconia (SO 2− 4 -ZrO2) provides evidence for infrared bands characteristic of both Brønsted and Lewis acid sites. Samples treated at 100°C retain water and have a higher fraction of Brønsted acidity than when the sample is treated at 400°C. The fraction of Brønsted acid sites observed for SO 2− 4 -ZrO2 is the same in the presence or absence of supported Pt. Based on pyridine adsorption, exposure to gaseous hydrogen at 100 or 150°C did not significantly alter the fraction of Brønsted acid sites following the exposure to hydrogen.
    Type of Medium: Electronic Resource
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