Laboratoire de réactivité de surface

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  • Article dans une revue

Flavonols and 3-hydroxychromones: new applications for a class of environment-sensitive fluorescent molecules

Stefano Protti, Alberto Mezzetti

Flavonols are naturally-occuring molecules that exhibit interesting fluorescence properties. Thanks to an excited-state intramolecular proton transfer, to specific interactions with their molecular environment and to ground-state proton transfer reactions, very often a dual or even triple…

Chimica Oggi - Chemistry Today, 2020, 38, pp.34-37. ⟨hal-04025211⟩

  • Article dans une revue

Improvement of the Catalytic Performances of SBA‐15 in the Formylation of Aniline upon the Introduction of Template‐Free Nano‐Faujasite in Its Synthesis Gel

Karima Baghdad, Mohammed Abdelkrim Hasnaoui, Franck Launay

Faujasite nanoparticles with average size of 10–40 nm were obtained without any organic structure directing agents (Green synthesis), then used as precursors for the synthesis of NaY/SBA-15 composites. Two types of composites were obtained with meso/micro porosity (C1 and C2).The inorganic salt,…

ChemistrySelect, 2021, 6 (30), pp.7636-7643. ⟨10.1002/slct.202101782⟩. ⟨hal-04025231⟩

  • Thèse

Confinement effect of Nickel in mesoporous silica-based catalysts for syngas production by reforming of methane with CO2, Effet de confinement du nickel dans des catalyseurs à base de silice mésoporeuse pour la production de gaz de synthèse par reformage du méthane avec le CO2

Marie-Nour Kaydouh

Although economically and environmentally advantageous, the methane dry reforming process using supported nickel based catalysts still faces problems of active phase (a transition metal) sintering and of carbon deposition, which result in catalytic activity loss. This thesis is focused on the study…, Malgré ses avantages économiques et environnementaux, le procédé de reformage à sec du méthane sur des catalyseurs au nickel supporté se heurte encore à des problèmes de frittage de la phase active (un métal de transition) et de dépôt de carbone, ce qui entraîne une diminution de l'activité…

Analytical chemistry. Université Pierre et Marie Curie - Paris VI; Université de Balamand (Tripoli, Liban), 2016. English. ⟨NNT : 2016PA066425⟩. ⟨tel-01628885⟩

  • Article dans une revue

Particle Size Effects in the Selective Hydrogenation of Alkadienes over Supported Cu Nanoparticles

Giorgio Totarella, Jan Willem de Rijk, Laurent Delannoy, Petra de Jongh

Copper is considered an excellent alternative to noble-metal selective hydrogenation catalysts. Herein, we systematically studied the effect of Cu nanoparticle size (2-10 nm) in the selective hydrogenation of 1,3-butadiene in excess of propene. The catalysts exhibited particle size-dependent…

ChemCatChem, 2022, 14 (19), pp.e202200348. ⟨10.1002/cctc.202200348⟩. ⟨hal-04025498⟩

  • Article dans une revue

The optimal heterogeneous catalyst for an acid-base reaction

Hervé Toulhoat

Different iron species exhibit distinct activity and selectivity in CO2 hydrogenation reaction. Herein, by controlling calcination temperature, Fe-Al interaction in Na promoted Fe-Al catalysts has been regulated, which further leads to various compositions of iron oxide (FeOx) and iron carbides (…

Journal of Catalysis, 2022, 413, pp.353-364. ⟨10.1016/j.jcat.2022.06.040⟩. ⟨hal-04025490⟩

  • Article dans une revue

Preparation of thin film gold based catalysts for oxidation reactions in liquid and gas phases

Anne-Félicie Lamic-Humblot, Philippe Barthe, Guillaume Guzman, Laurent Delannoy, Catherine Louis

This work deals with the preparation of gold on titania catalysts to make catalytic films in the less than 100 nm thickness area and its comparison with usual powder catalyst in catalytic oxidation reactions in gas and liquid phases. Titania was coated on glass plates with different thicknesses,…

Thin Solid Films, 2012, 527, pp.96-101. ⟨10.1016/j.tsf.2012.11.096⟩. ⟨hal-00906344⟩

  • Article dans une revue

Conversion of syngas-derived C 2 + mixed oxygenates to C 3 –C 5 olefins over Zn x Zr y O z mixed oxide catalysts

Colin Smith, Vanessa Lebarbier Dagle, Matthew Flake, Karthikeyan K. Ramasamy, Libor Kovarik, Mark Bowden, Thomas Onfroy, Robert A. Dagle

In this study we report on a ZnxZryOz mixed oxide type catalyst capable of converting a syngas-derived C2+ mixed oxygenate feedstock to isobutene-rich olefins. Aqueous model feed comprising of ethanol, acetaldehyde, acetic acid, ethyl acetate, methanol, and propanol was used as representative…

Catalysis Science & Technology, 2015, 6 (7), pp.2325 - 2336. ⟨10.1039/C5CY01261A⟩. ⟨hal-01547866⟩

  • Article dans une revue

LRS-1, a new delaminated phyllosilicate material with high acidity », Chem. Mater., 18(1), 34-40 (2006).

Bachar Zebib, Jean-François Lambert, Juliette Blanchard, Michèle Breysse

Well-crystallized samples of the phyllosilicate magadiite have been synthesized in their sodic form, both purely silicic and with an Al/Si ratio of 30. They have been delaminated by a procedure consisting of CTMA+ swelling in the presence of TPAOH, sonication, and calcination at 700°C to remove the…

Chemistry of Materials, 2006, 18 (1), pp.34-40. ⟨hal-00022068⟩

  • Article dans une revue

Hydrodeoxygenation of Furfural over Unsupported, SiO 2 ‐supported or Metal‐promoted Mo Carbides: Tunning the Selectivity between 2‐Methylfuran and C 10 Furoins Diesel Precursors

Letícia Sosa, Priscilla de Souza, Raphaela Rafael, Robert Wojcieszak, E. Marceau, Sébastien Paul, Valérie Briois, Fabio Noronha, Fabio Toniolo

Abstract The hydrodeoxygenation of furfural (FF) over Mo carbides in liquid phase at 200 °C, 30 bar of H 2 for 4 h in 2‐butanol was investigated. Unsupported and SiO 2 ‐supported Mo carbide with different crystallographic phases (β‐Mo 2 C/SiO 2 and α‐MoC/SiO 2 ), and in the presence of Cu and Ni as…

ChemCatChem, 2023, 16 (2), ⟨10.1002/cctc.202300890⟩. ⟨hal-04786694⟩

  • Article dans une revue

Controlling Magnesium Silicates Coprecipitation Conditions: A Tool to Tune Their Surface Acid–Base Reactivity

François Payan, Albert Issa, Jean-Marc Krafft, Yannick Millot, Thomas Onfroy, Capucine Sassoye, Jean-François Hochepied, Guillaume Laugel, Hélène Lauron-Pernot

Magnesium silicates combining acidic and basic surface properties are known to be interesting as heterogeneous catalysts. Nevertheless, their catalytic performances are highly dependent on the synthesis method used. In this study, a series of magnesium silicates was synthesized for the first time…

Catalysts, 2023, 13 (11), pp.1393. ⟨10.3390/catal13111393⟩. ⟨hal-04391661⟩