Document Detail


A resonant photoemission applied to cerium oxide based nanocrystals.
MedLine Citation:
PMID:  19423945     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
V Matolín; I Matolínová; L Sedlácek; K C Prince; T Skála
Related Documents :
21044815 - Mixture effects during the oxidation of toluene, ethyl acetate and ethanol over a crypt...
12027645 - Soluble polymer-supported ruthenium porphyrin catalysts for epoxidation, cyclopropanati...
19554205 - Enantioselective reduction of prochiral ketones using spiroborate esters as catalysts.
11082025 - Efficient catalytic conversion of pyridine n-oxides to pyridine with an oxorhenium(v) c...
14738855 - Dermal wound healing processes with curcumin incorporated collagen films.
2875185 - Thiazole-4-carboxamide adenine dinucleotide (tad). analogues stable to phosphodiesteras...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-05-06
Journal Detail:
Title:  Nanotechnology     Volume:  20     ISSN:  1361-6528     ISO Abbreviation:  Nanotechnology     Publication Date:  2009 May 
Date Detail:
Created Date:  2009-05-08     Completed Date:  2009-07-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  England    
Other Details:
Languages:  eng     Pagination:  215706     Citation Subset:  IM    
Affiliation:
Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 8, Czech Republic. matolin@mbox.troja.mff.cuni.cz
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Cerium / chemistry*,  radiation effects
Computer Simulation
Crystallization / methods*
Light
Macromolecular Substances / chemistry
Materials Testing
Models, Chemical*
Molecular Conformation
Nanostructures / chemistry*,  radiation effects,  ultrastructure*
Nanotechnology / methods*
Particle Size
Photons
Surface Properties
Chemical
Reg. No./Substance:
0/Macromolecular Substances; 1306-38-3/ceric oxide; 7440-45-1/Cerium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Surface enhanced Raman spectroscopy of organic molecules deposited on gold sputtered substrates.
Next Document:  Incremental effects of eicosapentaenoic acid on cardiovascular events in statin-treated patients wit...