| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 50896 | Catalysis Communications | 2011 | 5 Pages |
The effect of addition of ruthenium to different CexZr1−xO2 (0 ≤ x ≤ 1) supports on the oxidation of propylene and carbon black (CB) was investigated. The results showed that different reactive ruthenium oxide species are formed following calcination at 600 °C. The reactivity increases with the cerium content in the support, Ru/CeO2 being the most reactive catalyst. However, the Ce0.5Zr0.5O2 support and corresponding catalyst, Ru/Ce0.5Zr0.5O2, exhibited decreased reactivities comparing to solids with lower cerium content. This was ascribed to the formation of a solid structure that inhibits the interaction between cerium and ruthenium oxide species following impregnation.
Graphical AbstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► CeO2, ZrO2 and mixed oxides enhance the oxidation of carbon black and propylene. ► The impregnation of ruthenium improves the solids reactivities. ► Interactions between RuOx and CeO2 are responsible for the enhanced reactivity. ► The specific surface area and the redox behavior affect the catalytic reactivity. ► Zirconium doping did not lead to enhanced oxygen storage/release capacity.
