| 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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Especel, Catherine
University of Poitiers
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2015Hydrocarbon fuel synthesis from sorbitol over bifunctional catalysts: Association of tungstated titania with platinum, palladium or iridiumcitations
- 2015Selective ring opening of methylcyclohexane and decalin over Rh-Pd supported catalysts: Effect of the preparation methodcitations
- 2012Selective hydrogenation of citral to unsaturated alcohols over mesoporous Pt/Ti-Al2O3 catalysts. Effect of the reduction temperature and of the Ge additioncitations
- 2012Citral hydrogenation on high surface area mesoporous TiO2-SiO2 supported Pt nanocomposites: Effect of titanium loading and reduction temperature on the catalytic performancescitations
- 2011The relationship between the structural properties of bimetallic Pd-Sn/SiO2 catalysts and their performance for selective citral hydrogenation citations
- 2011Catalytic performances of large pore Ti-SBA15 supported Pt nanocomposites for the citral hydrogenation reaction citations
- 2010Control of titania nanodomain size as a route to modulate SMSI effect in Pt/TiO2 catalystscitations
- 2006Bimetallic Rh-Ge and Pt-Ge catalysts supported on TiO2 for citral hydrogenation I. Preparation and characterization of the catalysts citations
Places of action
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article
Bimetallic Rh-Ge and Pt-Ge catalysts supported on TiO2 for citral hydrogenation I. Preparation and characterization of the catalysts
Abstract
International audience ; Bimetallic TiO2-supported Rh-Ge and Pt-Ge catalysts were prepared by surface redox reaction between hydrogen activated on a parent monometallic rhodium or platinum catalyst and a germanium salt dissolved in water (catalytic reduction method). They were characterized by elemental analysis, transmission electronic microscopy (TEM), temperature-programmed reduction (TPR) and by their activity for the gas phase dehydrogenation of cyclohexane. Elemental analysis of the bimetallic catalysts showed that germanium can effectively be deposited by the catalytic reduction method on titania-supported Rh and Pt catalysts. Moreover, the different characterization methods (TEM, TPR and cyclohexane dehydrogenation) proved that germanium is in great interaction with rhodiurn and platinum. Nevertheless, some germanium deposition occurred also separately on the titania support. TEM and cyclohexane dehydrogenation results revealed that both rhodium and platinum particles were stable on titania support under the conditions of bimetallic catalyst preparation contrary to previous results obtained with silica or alumina supports. Effectively, no sintering has been observed when they were immersed in an aqueous solution under hydrogen bubbling (catalytic reduction protocol). Their catalytic performances for the cyclohexane dehydrogenation reaction indicate that all the catalysts reduced at high temperature (500 degrees C versus 300 degrees C developed the. strong metal-support interaction (SMSI) effect, which implied the formation of TiO(2-x) species. Whatever the nature of the parent metal (Rh and Pt), this effect was totally destroyed by air exposure of the samples at ambient temperature whereas one part of the TiO(2-x) moieties remained after immersion of the catalysts in an aqueous medium.