| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 50131 | Catalysis Communications | 2013 | 8 Pages |
The catalytic performance in the total oxidation of CO and methanol over gold catalysts supported on ceria doped by different metal oxides (Me = Fe, Mn and Co) was studied and a strong influence of the nature of dopant was observed. The activity towards the oxidation of CO and CH3OH was in the order: AuCeCo > AuCe > AuCeFe > AuCeMn. The characterization by XRD and HRTEM evidenced differences in the average size and the distribution of gold particles. AuCeCo catalyst exhibited superior low-temperature CO oxidation activity (100% conversion degree was obtained at 25 °C) and almost 100% total oxidation of CH3OH at about 40 °C. Higher hydrogen consumption was estimated by means of TPR over this catalyst. The effect of modification with Co3O4 of Au/CeO2 catalysts on their CO oxidation activity was further studied by varying of the dopant content (5, 10 and 15 wt.% Co3O4).
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Au catalysts on ceria doped by metal oxides (Me = Fe, Mn, Co) were synthesized. ► Strong influence of the nature of dopant was observed. ► Doped by Co ceria-based Au catalyst demonstrated superior LT CO oxidation activity. ► Doping of ceria by 10 wt.% Co3O4 appeared beneficial for high and stable activity.
