Effect of the support on the surface properties of ruthenium dioxide on silica glass
- 1 January 1984
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 80 (4) , 913-917
- https://doi.org/10.1039/f19848000913
Abstract
The surface properties of SiO2-supported RuO2 have been found to depend on the temperature and the procedure of sample preparation. In particular, the point of zero charge in KNO3 solutions has been observed to pass through a maximum at ca. 600 °C and then to drop at higher temperatures. Comparison with results obtained with RuO2 powders and the surface analysis of supported RuO2 by Auger electron spectroscopy have shown that substantial segregation of SiO2 to the surface of RuO2 takes place at temperatures higher than ca. 500 °C. These results suggest that caution should be used when interpreting data on the surface activity of SiO2-supported oxides.Keywords
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