| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 51857 | Catalysis Communications | 2011 | 6 Pages |
Novel 3D-like CeO2 microflowers and microspheres were synthesized by facile precipitation methods and tested for CO oxidation. Characterization by UV-Vis, PL, XPS and H2-TPR revealed that 3D-like ceria show great superiority for favoring formation of oxygen vacancies, which in turn leads to higher oxygen mobility and reducibility. A direct relationship between the band gap of ceria and its catalytic activity towards CO oxidation was established. The activity and thermal stability of 3D-like ceria were much better than that of CeO2 nanoparticles. The results indicated that the highly active ceria could be obtained by turning their shapes with a high concentration of oxygen vacancies.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Novel 3D-like CeO2 microflowers and microspheres were synthesized by facile precipitation methods and tested for CO oxidation. ► They exhibit an excellent low-temperature activity toward CO oxidation compared with CeO2 nanoparticles. ► A direct relationship was established between the bandgap of CeO2 and its catalytic activity towards CO oxidation. ► The higher activity of CeO2-s or CeO2-f may be attributed to the shape effect of the CeO2 with various morphologies, resulting in the formation of abundant defects in the CeO2.
