In situ observation of highly oxidized Ru species in Ru/CeO2 catalyst under propane oxidation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10446960" target="_blank" >RIV/00216208:11320/22:10446960 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1una.6gsqx" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1una.6gsqx</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d2ta02330j" target="_blank" >10.1039/d2ta02330j</a>

Result language
angličtina
Original language name
In situ observation of highly oxidized Ru species in Ru/CeO2 catalyst under propane oxidation
Original language description
In this work, we prepared a promising catalyst for propane oxidation composed of ruthenium supported on polycrystalline hollow CeO2 nanospheres. It was found that the Ru loading on the CeO2 support strongly improves its catalytic activity, decreasing the T-50 by about 200 degrees C (from 500 to about 300 degrees C). By utilizing several ex situ techniques (XRD, HR-STEM, Raman spectroscopy, ICP analysis) and in situ NAP-XPS, we investigated the effect of different pre-treatments (calcination, reduction, and C3H8 oxidation reaction) on the morphology, structure, and chemical state of the Ru/CeO2 catalyst. The correlations between the chemical state of ruthenium in the Ru/CeO2 catalyst and its activity in C3H8 oxidation received particular attention. Here, it is shown for the first time that the Ru/CeO2 interaction with an oxygen-rich atmosphere (C3H8 + O-2 (1 : 10)) at >= 300 degrees C results in ruthenium oxidation to volatile RuO4, leading to Ru evaporation/desorption from the outer surface and homogeneous high dispersion inside the powder catalyst.
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
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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