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  • 1
    Electronic Resource
    Electronic Resource
    Investigation of La3+-modified Al2O3supported CeO2 (1993)
    Springer
    Catalysis letters 17 (1993), S. 175-184 
    Details
    ISSN: 1572-879X
    Keywords: Lanthana-modified alumina ; alumina-supported ceria ; oxygen storage ; three-way catalyst ; X-ray photoelectron spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract X-ray photoelectron spectroscopy measurements indicate that the Ce3+ fraction in Al2O3-supported CeO2 can be decreased by the incorporation of La3+. If La3+ is incorporated into the Al2O3 before CeO2 is added, a higher CeO2 dispersion and a greater range of reversible reducibility of the CeO2 may also be obtained. These changes offer potential for improvement in the oxygen storage capacity provided by CeO2 in three-way catalysts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00763940
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  • 2
    Electronic Resource
    Electronic Resource
    Incorporation of La3+ into a Pt/CeO2/Al2O3 catalyst (1994)
    Springer
    Catalysis letters 30 (1994), S. 53-63 
    Details
    ISSN: 1572-879X
    Keywords: lanthana ; alumina ; ceria ; Pt ; three-way catalyst ; oxygen storage ; X-ray diffraction ; CO chemisorption ; temperature-programmed reduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The effects of La3+ incorporation into a Pt/CeO2/Al2O3 catalyst were investigated by a combination of activity, temperature-programmed reduction (TPR), oxygen storage capacity (OSC), noble-metal surface area, and X-ray diffraction (XRD) measurements. Incorporation of La3+ ions into the Al2O3, before CeO2 is added, promoted higher Pt and CeO2 dispersions. The oxygen storage capacity was also higher in the presence of La3+. This is attributed to a combination of Pt and CeO2 particle-size effects and possible blockage of the reaction between Al2O3 and CeO2. The XRD data show that La3+ forms LaAlO3 with Al2O3 and prevents α-Al2O3 formation after various heat treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00813672
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    Paper (German National Licenses)
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