High-resolution spectroscopy of europium-doped ceria as a tool to correlate structure and catalytic activity
- Site-selective emission spectra of Eu3+-doped CeO2 nanoparticles up to the D-5(0) - F-7(5) transition were recorded under cryogenic conditions to identify the local structure around the Eu3+ dopants in ceria. It is found that pretreatment conditions are crucial for the redistribution of dopants from a broad variety of environments to six well-defined lattice sites. The influence of the dopant and the host structure on the catalytic activity was investigated. A relationship between structure and reactivity is discussed. It is shown that oxygen transport is most efficient in particles with a pronounced amorphous character.
| Author details: | Philipp-Alexander Primus, Thomas Ritschel, Pilar Y. Sigueenza, Miguel Angel CauquiORCiD, Juan Carlos Hernandez-GarridoORCiD, Michael Uwe KumkeORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1021/jp505467r |
| ISSN: | 1932-7447 |
| Title of parent work (English): | The journal of physical chemistry : C, Nanomaterials and interfaces |
| Publisher: | American Chemical Society |
| Place of publishing: | Washington |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2014 |
| Publication year: | 2014 |
| Release date: | 2017/03/27 |
| Volume: | 118 |
| Issue: | 40 |
| Number of pages: | 12 |
| First page: | 23349 |
| Last Page: | 23360 |
| Funding institution: | German Academic Exchange Service (DAAD); [MAT2013-40823-R]; [CSD2009-00013] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
| Peer review: | Referiert |
