Laboratoire de réactivité de surface

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  • Article dans une revue

Spectroscopie d'absorption X et catalyse hétérogène

Edmond Payen, Laurent Barthe, Elise Berrier, Juliette Blanchard, Valérie Briois, Xavier Carrier, Michel Che, Sylvain Cristol, Anne Griboval-Constant, Jingping Hong, Yves Joly, Andrei Y. Khodakov, Camille La Fontaine, Eric Marceau, Pascale Massiani, Asma Tougerti

La connaissance détaillée des mécanismes de réaction en catalyse hétérogène nécessite une description précise de la géométrie et de l'environnement local des sites actifs qui sont déterminants pour les performances catalytiques (conversion, sélectivité). La spectroscopie d'absorption X…

L'Actualité Chimique, 2011, 356-357, pp.20-28. ⟨hal-00667490⟩

  • Article dans une revue

Quantitative Investigation of MgO Bronsted Basicity: DFT, IR, and Calorimetry Study of Methanol Adsorption

Hugo Petitjean, Konstantin Tarasov, Francoise Delbecq, Philippe Sautet, Jean-Marc Krafft, Philippe Bazin, Maria Cristina Paganini, Elio Giamello, Michel Che, Helene Lauron-Pernot, Guylene Costentin

The adsorption geometries, energies, and vibrational frequencies of methanol on MgO defective surfaces have been calcd. by periodic DFT simulations. The results are very comparable with those obtained with water and are also in very good accordance with microcalorimetry and IR expts. At low…

Journal of Physical Chemistry C, 2010, 114 (7), pp.3008-3016. ⟨10.1021/jp909354p⟩. ⟨hal-00604791⟩

  • Article dans une revue

Influence of Preparation and Activation on the Speciation of Carbon‐Supported Mo–W Carbides

Parviz Azimov, Céline Sayag, Clement Guibert, Axel Wilson, Abdallah Nassereddine, Antonio Aguilar-Tapia, Jean-Louis F Hazemann, Xavier Carrier

ABSTRACT Carbon‐supported Mo–W carbides were synthesized by two different methods (co‐impregnation and sequential impregnation of W and Mo precursors) to unravel how precursor impregnation controls carburization pathways. In situ W L 3 ‐edge HERFD‐XAS and Mo K‐edge XAS, quantitatively analyzed by…

ChemCatChem, 2026, 18 (4), pp.e00006. ⟨10.1002/cctc.202600006⟩. ⟨hal-05517736⟩

  • Article dans une revue

Influence of Dealumination by Acetylacetone on Acidity and Activity of Amorphous Silica-Aluminas

Xiaojing Jin, Yannick Millot, Céline Sayag, Juliette Blanchard, Pascal Ping Man

The influence of dealumination of two commercial amorphous silica-aluminas (ASAs) with acetylacetone on their textural properties, acidity and catalytic activity was studied by N2-sorption, NH3-TPD, FTIR of adsorbed pyridine as well as 1 H and 27 Al MAS NMR. Acetylacetone treatment increases the…

ChemistrySelect, 2020, 5 (8), pp.2489-2495. ⟨10.1002/slct.201904712⟩. ⟨hal-02919070⟩

  • Article dans une revue

Nanocrystalline NbC formation from mesostructured niobium oxide studied by HRTEM, SAED and in situ XRD

S. Witkowski, M. Ruszak, Celine Sayag, J. Pielaszek, G. Djéga-Mariadassou

Mechanism of the nanometric size niobium carbide synthesis from mesostructured niobium oxide precursor is proposed. High-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) combined with in situ X-ray diffraction (XRD) were successfully used to study…

Applied Catalysis A: General, 2006, 307, pp.205-211. ⟨10.1016/j.apcata.2006.03.044⟩. ⟨hal-00128099⟩

  • Article dans une revue

Application of computational approach in plastic pyrolysis kinetic modelling: a review

Sabino Armenise, Syieluing Wong, José M Ramírez-Velásquez, Franck Launay, Daniel Wuebben, Bemgba B Nyakuma, Joaquín Rams, Marta Muñoz

During the past decade, pyrolysis routes have been identified as one of the most promising solutions for plastic waste management. However, the industrial adoption of such technologies has been limited and several unresolved blind spots hamper the commercial application of pyrolysis. Despite many…

Reaction kinetics, mechanisms and catalysis, 2021, ⟨10.1007/s11144-021-02093-7⟩. ⟨hal-03442637⟩

  • Article dans une revue

Incorporation of vanadium into the framework of hydroxyapatites: importance of the vanadium content and pH conditions during the precipitation step

Sarah Petit, Thrimurthulu Gode, Cyril Thomas, Stanislaw Dzwigaj, Yannick Millot, Dalil Brouri, Jean-Marc Krafft, Gwenaelle Rousse, Christel Laberty-Robert, Guylène Costentin

Even though vanadium-modified hydroxyapatite (V-HAp) samples are very promising systems for oxidative dehydrogenation of propane, the incorporation of vanadium into the hydroxyapatite framework was reported to be limited and to lead to over-stoichiometric compounds. Here, the synthesis of a Ca10…

Physical Chemistry Chemical Physics, 2017, 19 (14), pp.9630 - 9640. ⟨10.1039/C6CP08782E⟩. ⟨hal-01522440⟩

  • Article dans une revue

Copper Zinc Aluminate Synthesized by Sol-Gel Method with Polyacrylic Acid as Catalysts for Glycerol Hydrogenolysis

L. Omar, T. Onfroy, S. Daniele, N. Perret

This study describes the use of novel Cu/ZnO/ZnAl2O4/PAAH (PAAH=polyacrylic acid) hybrid nanomaterials for glycerol hydrogenolysis. Their elaboration by sol-gel process either in one step or in two steps allowed to modulate their structural properties in terms of specific surface area, Lewis…

ChemCatChem, 2023, 15 (4), ⟨10.1002/cctc.202201297⟩. ⟨hal-03999405⟩

  • Article dans une revue

Evidence for an H2 promoting effect in the selective catalytic reduction of NO(x) by propene on Au/Al2O3.

Tesnim Chaieb, Laurent Delannoy, Sandra Casale, Catherine Louis, Cyril Thomas

This work provides the first experimental evidence of an H2 effect in C3H6-SCR over an Au/Al2O3 catalyst. This effect could only be observed when the number of Au catalytic sites was decreased. The N2 turnover rate estimated for the first time for the Au catalytic sites for H2–C3H6-SCR was found to…

Bulgarian Chemical Communications, 2015, 51 (4), pp.796-9. ⟨10.1039/c4cc07349e⟩. ⟨hal-01121184⟩

  • Article dans une revue

Selectivities in Adsorption and Peptidic Condensation in the (Arginine and Glutamic Acid)/Montmorillonite Clay System

Maguy Jaber, Thomas Georgelin, Houssein Bazzi, France Costa-Torro, Jean-François Lambert, Gérard Bolbach, Gilles Clodic

The present study examines the selective adsorption and polymerization of two amino acids, glutamic acid (Glu) and arginine (Arg), on a cationic clay mineral, montmorillonite (Mt). Two experimental procedures were used: selective adsorption and wet impregnation. In the first case, an adsorption…

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 2014, 118 (44), pp.25447-25455. ⟨10.1021/jp507335e⟩. ⟨hal-01121644⟩