| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1489233 | Materials Research Bulletin | 2013 | 4 Pages |
•A new OSC material of Ce0.5Zr0.3Al0.2O1.9/Pd/γ-Al2O3 is prepared via a mechanochemical method.•Ce0.5Zr0.3Al0.2O1.9/Pd/γ-Al2O3 showed high OSC even after calcination at 1000 °C for 20 h.•Ce0.5Zr0.3Al0.2O1.9/Pd/γ-Al2O3 exhibited the highest CO oxidation activity at low temperature correlates with enhanced OSC.
The Ce0.5Zr0.3Al0.2O1.9/Pd-γ-Al2O3 catalyst prepared by a mechanochemical route and calcined at 1000 °C for 20 h in air atmosphere to evaluate the thermal stability. The prepared Ce0.5Zr0.3Al0.2O1.9/Pd-γ-Al2O3 catalyst was characterized for the oxygen storage capacity (OSC) and CO oxidation activity in automotive catalysis. For the characterization, X-ray diffraction, transmission electron microscopy and the Brunauer–Emmet–Teller (BET) technique were employed. The OSC values of all samples were measured at 600 °C using thermogravimetric-differential thermal analysis. Ce0.5Zr0.3Al0.2O1.9/Pd-γ-Al2O3 catalyst calcined at 1000 °C for 20 h with a BET surface area of 41 m2 g−1 exhibited the considerably high OSC of 583 μmol-O g−1 and good OSC performance stability. The same synthesis route was employed for the preparation of the CeO2/Pd-γ-Al2O3 and Ce0.5Zr0.5O2/Pd-γ-Al2O3 for comparison.
Graphical abstractCe0.5Zr0.3Al0.2O1.9/Pd/γ-Al2O3 possessed high OSC and CO oxidation activity at low temperature.Figure optionsDownload full-size imageDownload as PowerPoint slide
