Abstract
A series of co-precipitated RuO2-Al2O3 samples was characterized by means of bulk and surface techniques such as X-ray diffraction (XRD), specific surface area measurements, X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). The existence of a substitutional solid solution of Al3+ ions in RuO2 is suggested on the basis of XRD results. A more detailed study of such a phase was hindered by its thermal instability. XPS and AES quantitative data indicate a strong enrichment of Al on the surface. A simple model based on a reciprocal masking action of the particles of the two oxides with respect to the primary beam (X-rays or electrons) was found to fit the surface composition data well.
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Garbassi, F., Bossi, A. & Petrini, G. Co-precipitated RuO2-Al2O3 catalysts: bulk and surface characterization. J Mater Sci 15, 2559–2568 (1980). https://doi.org/10.1007/BF00550760
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DOI: https://doi.org/10.1007/BF00550760