Cerium Oxide Nanostructures on Titania: Effect of the Structure and Stoichiometry on the Reactivity Toward Ethanol Oxidation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10425357" target="_blank" >RIV/00216208:11320/18:10425357 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=QUUy8naRPY" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=QUUy8naRPY</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpcc.8b05807" target="_blank" >10.1021/acs.jpcc.8b05807</a>
Alternative languages
Result language
angličtina
Original language name
Cerium Oxide Nanostructures on Titania: Effect of the Structure and Stoichiometry on the Reactivity Toward Ethanol Oxidation
Original language description
Nanocatalysis is a multidisciplinary field in which catalytic reactions are explored, understood, and improved by means of surface science methods. Model systems are a good playground to develop new interfaces where uncommon geometries and special active sites are stabilized. Cerium oxide deposited on titanium dioxide represents a good example of this. Thanks to a charge transfer from the titania support, Ce3+ sites grow at the interface. Thick cerium oxide layers show both Ce3+ and Ce4+ oxidation states, whereas only Ce3+ is detected in the monolayer. This demonstrates that the charge transfer is limited to the interface. In the present study, we grew and characterized two cerium oxide layers having different thicknesses, namely, 2 and 6 monolayer equivalents, on rutile (110), and investigated their reactivity toward the partial oxidation of ethanol. Our results show that the selectivity and the reaction mechanism are affected by the thickness of the cerium oxide. In particular, a stoichiometric reaction involving surface oxygen sites takes place on the thinner reduced film, whereas at higher ceria coverage, the presence of the Ce3+Ce4+ redox couple favors a catalytic reaction in which gas-phase oxygen is activated on ceria and then reacts with adsorbed ethanol.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
—
Continuities
—
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physical Chemistry C
ISSN
1932-7447
e-ISSN
—
Volume of the periodical
122
Issue of the periodical within the volume
36
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
20809-20816
UT code for WoS article
000444920900027
EID of the result in the Scopus database
2-s2.0-85052371097