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  • 1
    Electronic Resource
    Electronic Resource
    Zirconium oxide supported on Pd(100): Characterization by scanning tunneling microscopy and tunneling spectroscopy (1992)
    Springer
    Catalysis letters 15 (1992), S. 317-327 
    Details
    ISSN: 1572-879X
    Keywords: Zirconium oxide ; palladium ; scanning tunneling microscopy ; tunneling spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Scanning tunneling microscopy (STM) and tunneling spectroscopy (TS) were used to characterize the structure of a model metal-supported dispersed metal oxide, ZrO2 on Pd(100). STM images illustrate changes in the surface morphology of the ZrO2 resulting from various chemical treatments. When the sample was treated in O2, the ZrO2 appeared as a smooth, featureless overlayer of varying thickness wetting the Pd. After treatment in H2, the ZrO2 formed non-wetting particles on the Pd, with a sharp Pd-ZrO2 interface. TS provided a fingerprint that verified the presence of a semiconducting overlayer on a metallic support. These results appear to be consistent with X-ray absorption spectra of ZrO2 supported on Pd black, reported elsewhere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00769154
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  • 2
    Electronic Resource
    Electronic Resource
    Asymmetric structure analysis of active surface-sites by in situ polarized total-reflection fluorescence EXAFS (1993)
    Springer
    Catalysis letters 20 (1993), S. 117-124 
    Details
    ISSN: 1572-879X
    Keywords: Polarized total reflection EXAFS ; EXAFS of Cu on α-quartz ; EXAFS of cobalt oxide on α-alumina ; EXAFS of platinum on α-alumina
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An in situ polarization-dependent total reflection fluorescence yield EXAFS system has been developed to analyze the asymmetric structures of catalytically active metal sites on single crystal surfaces. This technique separately reveals the bonding feature parallel and perpendicular to the support surface. The systems of Cu ion on α-quartz(0001), Co oxide on α-alumina(0001), and Pt4 on α-alumina(0001) were investigated as model surfaces of supported catalytic systems. The location of Cu sites on α-quartz(0001), the epitaxial growth mode of Co3O4 on α-alumina(0001), and the Pt raft structure with metal-support interaction in Pt4 / α-alumina(0001) were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00772603
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