Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/183458
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Campo DC | Valor | Lengua/Idioma |
---|---|---|
dc.contributor.author | Petallidou, Klito C. | - |
dc.contributor.author | Polychronopoulou, Kyriaki | - |
dc.contributor.author | Boghosian, Soghomon | - |
dc.contributor.author | García Rodríguez, Sergio | - |
dc.contributor.author | Efstathiou, Angelos | - |
dc.date.accessioned | 2019-06-06T07:41:05Z | - |
dc.date.available | 2019-06-06T07:41:05Z | - |
dc.date.issued | 2013-12-05 | - |
dc.identifier.citation | Journal of Physical Chemistry C 117(48): 25467-25477 (2013) | - |
dc.identifier.issn | 1932-7447 | - |
dc.identifier.uri | http://hdl.handle.net/10261/183458 | - |
dc.description.abstract | Pt nanoparticles (1.2–2.0 nm size) supported on Ce1–xTixO2−δ (x = 0, 0.2, 0.5, 0.8, and 1.0) carriers synthesized by the citrate sol–gel method were tested toward the water–gas shift (WGS) reaction in the 200–350 °C range. A deep insight into the effect of two structural parameters, the chemical composition of support (Ce/Ti atom ratio), and the Pt particle size on the catalytic performance of Pt-loaded catalysts was realized after employing in situ X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM) and HAADF/STEM, scanning electron microscopy (SEM), in situ Raman and diffuse reflectance infrared Fourier transform (DRIFT) spectroscopies under different gas atmospheres, H2 temperature-programmed reduction (H2-TPR), and temperature-programmed desorption (NH3-TPD and CO2-TPD) techniques. The 0.5 wt % Pt/Ce0.8Ti0.2O2−δ solid (dPt = 1.7 nm) was found to be by far the best catalyst among all the other solids investigated. In particular, at 250 °C the CO conversion over Pt/Ce0.8Ti0.2O2−δ was increased by a factor of 2.5 and 1.9 compared to Pt/TiO2 and Pt/CeO2, respectively. The catalytic superiority of the Pt/Ce0.8Ti0.2O2−δ solid is the result of the support’s (i) robust morphology preserved during the WGS reaction, (ii) moderate acidity and basicity, and (iii) better reducibility at lower temperatures and the significant reduction of “coking” on the Pt surface and of carbonate accumulation on the Ce0.8Ti0.2O2−δ support. Several of these properties largely influenced the reactivity of sites (k, s–1) at the Pt–support interface. In particular, the specific WGS reaction rate at 200 °C expressed per length of the Pt–support interface (μmol CO cm–1 s–1) was found to be 2.2 and 4.6 times larger on Pt supported on Ce0.8Ti0.2O2−δ (Ti4+-doped CeO2) compared to TiO2 and CeO2 alone, respectively. | - |
dc.description.sponsorship | The European Regional Development Fund, the Republic of Cyprus, the Research Promotion Foundation of Cyprus, and the Research Committee of the University of Cyprus are gratefully acknowledged for their financial support through the project TEXNO/0308(BE)/05. S.B. acknowledges financial support from the COST Action CM1104. | - |
dc.publisher | American Chemical Society | - |
dc.rights | closedAccess | - |
dc.title | Water-gas shift reaction on Pt/Ce1- xTixO 2-δ: The effect of Ce/Ti ratio | - |
dc.type | artículo | - |
dc.identifier.doi | 10.1021/jp406059h | - |
dc.relation.publisherversion | https://doi.org/10.1021/jp406059h | - |
dc.identifier.e-issn | 1932-7455 | - |
dc.date.updated | 2019-06-06T07:41:06Z | - |
dc.description.version | Peer Reviewed | - |
dc.language.rfc3066 | eng | - |
dc.contributor.funder | European Commission | - |
dc.contributor.funder | University of Cyprus | - |
dc.contributor.funder | European Cooperation in Science and Technology | - |
dc.identifier.funder | http://dx.doi.org/10.13039/501100000780 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100000921 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.fulltext | No Fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | none | - |
item.openairetype | artículo | - |
Aparece en las colecciones: | (ICP) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 15,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
50
checked on 17-abr-2024
WEB OF SCIENCETM
Citations
44
checked on 25-feb-2024
Page view(s)
184
checked on 23-abr-2024
Download(s)
38
checked on 23-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.