A resonant photoemission applied to cerium oxide based nanocrystals
Language English Country England, Great Britain Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
19423945
DOI
10.1088/0957-4484/20/21/215706
PII: S0957-4484(09)92111-0
Knihovny.cz E-resources
- MeSH
- Cerium chemistry radiation effects MeSH
- Models, Chemical * MeSH
- Photons MeSH
- Crystallization methods MeSH
- Macromolecular Substances chemistry MeSH
- Molecular Conformation MeSH
- Nanostructures chemistry radiation effects ultrastructure MeSH
- Nanotechnology methods MeSH
- Computer Simulation MeSH
- Surface Properties MeSH
- Light MeSH
- Materials Testing MeSH
- Particle Size MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Cerium MeSH
- ceric oxide MeSH Browser
- Macromolecular Substances MeSH
Cerium 4f level occupation determines the properties of cerium oxide based catalysts in a significant way. The Ce 4f level of nanosized cerium oxide particles was investigated with the use of resonant photoelectron spectroscopy in the Ce 4d-4f photoabsorption region. A strong interaction of ceria with different additives, e.g. Pd and Sn, led to a partial Ce4+-->Ce3+ transition that was observed as a significant resonance enhancement of 4f photoemission intensity. Increases of the CO oxidation catalytic activity were observed simultaneously. The ratio of resonance enhancement of Ce photoemission intensity DCe(3+)/DCe(4+) was used to monitor Ce(3+) and Ce(4+) state occupation. The relative parameter DCe(3+)/DCe(4+) was found to be particularly useful in the case of photoemission studies of nanopowder ceria catalysts.
References provided by Crossref.org
Heteroepitaxy of Cerium Oxide Thin Films on Cu(111)
