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The effects of SO2 on the oxidation of CO and propane on supported Pt and Au catalysts |
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| Authors: | K Ruth M Hayes R Burch S Tsubota M Haruta |
| Affiliation: | a Catalysis Research Centre, Chemistry Department, The University of Reading, Whiteknights, Reading RG6 6AD, UK b Osaka National Research Institute, AIST, Midorigaoka, 1-8-31, Ikeda, Osaka 563-8577, Japan |
| Abstract: | The catalytic activities of Pt and Au supported on TiO2 were compared with respect to the oxidation of CO and propane. While the Au catalysts showed higher activities for CO oxidation, the Pt catalysts were more active for propane combustion. A strong de-activation of the CO oxidation activity by SO2 was observed only over the TiO2-supported Au catalyst, indicating that SO2 can block the active sites for CO oxidation over Au catalysts. The results are consistent with a model in which the perimeter sites have a special role in the CO oxidation reaction over Au catalysts. |
| Keywords: | Catalysis Gold Platinum Carbon monoxide Propane Oxidation Sulphur dioxide Perimeter active sites |
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