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Local structure of Pt and Pd ions in Ce(1-x)TixO2: x-ray diffraction, x-ray photoelectron spectroscopy, and extended x-ray absorption fine structure.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Baidya, Tinku Priolkar, Kaustubh R. Sarode, Prabhakar Ravaji Hegde, Manjanath S. Asakura, Kiyotaka Tateno, G. Koike, Yuya |
| Copyright Year | 2008 |
| Abstract | Ce(1-x-y)Ti(x)Pt(y)O(2-delta) (x=0.15; y=0.01) and Ce(1-x-y)Ti(x)Pd(y)O(2-delta) (x=0.25; y=0.02 and 0.05) are found to be good CO oxidation catalysts [T. Baidya et al., J. Phys. Chem. B 110, 5262 (2006); T. Baidya et al., J. Phys. Chem. C 111, 830 (2007)]. A detailed structural study of these compounds has been carried out by extended x-ray absorption fine structure along with x-ray diffraction and x-ray photoelectron spectroscopy. The gross cubic fluorite structure of CeO(2) is retained in the mixed oxides. Oxide ion sublattice around Ti as well as Pt and Pd ions is destabilized in the solid solution. Instead of ideal eight coordinations, Ti, Pd, and Pt ions have 4+3, 4+3, and 3+4 coordinations creating long and short bonds. The long Ti-O, Pd-O, and Pt-O bonds are approximately 2.47 A (2.63 A for Pt-O) which are much higher than average Ce-O bonds of 2.34 A. |
| Starting Page | 124711 |
| Ending Page | 124711 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| DOI | 10.1063/1.2841365 |
| PubMed reference number | 18376964 |
| Journal | Medline |
| Volume Number | 128 |
| Issue Number | 12 |
| Alternate Webpage(s) | http://eprints.iisc.ernet.in/15510/1/Local_structure_of.pdf |
| Alternate Webpage(s) | https://doi.org/10.1063/1.2841365 |
| Journal | The Journal of chemical physics |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
