ZIRCONIUM-OXIDE SUPPORTED ON PD(100) - CHARACTERIZATION BY SCANNING TUNNELING MICROSCOPY AND TUNNELING SPECTROSCOPY
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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. 1992 J.C. Baltzer A.G. Scientific Publishing Company.
author list (cited authors)
ASAKURA, K., IWASAWA, Y., PURNELL, S. K., WATSON, B. A., BARTEAU, M. A., & GATES, B. C.
complete list of authors
ASAKURA, K||IWASAWA, Y||PURNELL, SK||WATSON, BA||BARTEAU, MA||GATES, BC