States of Pt/CeO2 catalysts for CO oxidation below room temperature

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10475749" target="_blank" >RIV/00216208:11320/23:10475749 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xP0c878JhT" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xP0c878JhT</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jcat.2023.03.004" target="_blank" >10.1016/j.jcat.2023.03.004</a>

Result language
angličtina
Original language name
States of Pt/CeO2 catalysts for CO oxidation below room temperature
Original language description
CO molecules can be efficiently oxidized over Pt/CeO2 catalysts, but the stability and reactivity of differ-ent states of Pt in the catalysts are still unclear. Here we combine experimental and computational meth-ods to characterize Pt/CeO2 catalysts subjected to reductive and oxidative pre-treatments and exposed CO oxidation reaction conditions. Particles of metallic Pt, known to be catalytically active at elevated tem-perature, are shown to be precursors for the formation, under operando conditions, of more stable PtOx particles that enable CO oxidation below room temperature. These PtOx particles are similarly stable to - but more active than - atomically dispersed Pt2+ species. The results and approaches presented this study illustrate the complex response of catalytic materials to reaction conditions and pave the way for future efforts to improve Pt/CeO2 and similar catalysts using dedicated pre-treatment strategies.(c) 2023 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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