| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Piccolo, Laurent
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2023Investigating the Dynamics of Pt/CeO<sub>2</sub> Catalysts at the Powder Agglomerate Scale by Combining <i>In Situ</i> Hyperspectral Raman Imaging and SEM‐EDX Analysiscitations
- 2020Reactivity and Catalysis by Nanoalloyscitations
- 2020Catalytic activation of a non-noble intermetallic surface through nanostructuration under hydrogenation conditions revealed by atomistic thermodynamicscitations
- 2020From the Surface Structure to Catalytic Properties of Al 5 Co 2 (21̅0): A Study Combining Experimental and Theoretical Approachescitations
- 2019Degradation Mechanisms of Oxygen Evolution Reaction Electrocatalysts: A Combined Identical-Location Transmission Electron Microscopy and X-Ray Photoelectron Spectroscopy Study
- 2018Thermodynamics of faceted palladium(-gold) nanoparticles supported on rutile titania nanorods studied using transmission electron microscopycitations
- 2017Monitoring in situ the colloidal synthesis of AuRh/TiO 2 selective-hydrogenation nanocatalystscitations
- 2017Intermetallic compounds as potential alternatives to noble metals in heterogeneous catalysis: The partial hydrogenation of butadiene on alpha-Al4Cu9(110)citations
- 2016A DFT study of molecular adsorption on Au–Rh nanoalloyscitations
Places of action
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article
Investigating the Dynamics of Pt/CeO<sub>2</sub> Catalysts at the Powder Agglomerate Scale by Combining <i>In Situ</i> Hyperspectral Raman Imaging and SEM‐EDX Analysis
Abstract
<jats:title>Abstract</jats:title><jats:p>The dynamics of Pt/CeO<jats:sub>2</jats:sub> catalysts is a hot topic since its knowledge can be used to (re)generate more active sites for redox reactions, even at low temperature (<500 °C). While numerous works focus on the atomic scale, the spatial extent of Pt surface diffusion is poorly known. In this work, it is evaluated at the powder agglomerate scale using an original methodology combining SEM‐EDX analysis and <jats:italic>in situ</jats:italic> optical/microRaman hyperspectral imaging performed on a Pt/CeO<jats:sub>2</jats:sub>+CeO<jats:sub>2</jats:sub> mechanical mixture. No intergranular diffusion of platinum during redox cycles at 500 °C is revealed by these techniques, in particular by the Raman images of Ce<jats:sup>3+</jats:sup> and peroxo species, which are highly sensitive to the presence of Pt atoms. It strongly suggests that Pt surface diffusion takes place only at the nanometer scale and could be limited by atom trapping on Pt/CeO<jats:sub>2</jats:sub> agglomerates. Our method for investigating diffusion processes at the micrometer scale may be extended to other thermochemical conditions and other materials.</jats:p>