• Article dans une revue

Revisiting Acido-basicity of the MgO Surface by Periodic Density Functional Theory Calculations: Role of Surface Topology and Ion Coordination on Water Dissociation

Céline Chizallet, Guylène Costentin, Michel Che, Françoise Delbecq, Philippe Sautet

Low-coordinated (LC) ions at the MgO surface (noted Mg2+ LC and O2- LC with L ) 1-5), located on monatomic and diatomic steps, corners, step divacancies, and kinks, have been modeled thanks to periodic density functional theory (DFT) calculations (VASP). Ions of lowest coordination induce the…

Journal of Physical Chemistry B, 2006, 110, pp.15878-15886. ⟨10.1021/jp060840l⟩. ⟨hal-00112168⟩

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Bi2O3, BiVO4, and Bi2WO6: Impact of Surface Properties on Photocatalytic Activity under Visible Light

Tamar Saison, Nicolas Chemin, Corinne Chaneac, Olivier Durupthy, Valerie Ruaux, Laurence Mariey, Françoise Mauge, Patricia Beaunier, Jean-Pierre Jolivet

Bismuth-based oxides have attractive photocatalytic properties under visible light. A better understanding of the origin of that good photocatalytic activity should allow its control and its optimization. In this Article, we have studied the impact of surface properties on photocatalytic activity…

Journal of Physical Chemistry C, 2011, 115 (13), pp.5657-5666. ⟨10.1021/jp109134z⟩. ⟨hal-01840373⟩

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kinetics of the plasmon optical response of Au nanoparticles/TiO2 catalyst under O2 and H2 followed by differential diffuse reflectance spectroscopy

Yves Borensztein, Laurent Delannoy, Ruben G. Barrera, Catherine Louis

The changes in the optical properties of Au/TiO2 powder catalyst, prepared by the deposition-precipitation method, are measured in the visible range by use of a home-made diffuse differential reflectance spectrometer, when the ambient atmosphere is switched between H2 and O2. Two main features are…

The European Physical Journal D : Atomic, molecular, optical and plasma physics, 2011, 63, pp.235. ⟨10.1140/epjd/e2011-10529-2⟩. ⟨hal-00648582⟩

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Adsorption of functionalised thiols on gold surfaces: how to build a sensitive and selective sensor for a nitroaromatic compound?

F. Thery-Merland, Christophe Méthivier, Eric Pasquinet, Lionel Hairault, Claire-Marie Pradier

Adsorption of thiols of varying structures bearing amine, acid or aromatic functionalities was characterised by Polarisation Modulation Infrared Absorption Spectroscopy (PM-IRRAS). The so functionalised surfaces were then submitted to atmospheres containing traces of 2,4-…

Sensors and Actuators B: Chemical, 2006, 114, pp.223-228. ⟨10.1016/j.snb.2005.04.040⟩. ⟨hal-00111676⟩

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Comparison between tungsten carbide and molybdenum carbide for the hydrodenitrogenation of carbazole

Agnieszka Szymanska-Kolasa, Marek Lewandowski, Celine Sayag, Dominique Brodzki, G. Djéga-Mariadassou

The activity of molybdenum and tungsten carbides in hydrodenitrogenation (HDN) of carbazole was studied. Transition metal carbides (Mo2C and W2C) were synthesized using the temperature-programmed reaction of the appropriate oxide precursor (MoO3 and WO3) with the following gas mixture: 10 vol.% CH4…

Catalysis Today, 2006, 119, pp.35-38. ⟨10.1016/j.cattod.2006.08.039⟩. ⟨hal-00128071⟩

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A Time-Resolved In Situ Quick-XAS Investigation of Thermal Activation of Fischer-Tropsch Silica-Supported Cobalt Catalysts

Hong Jingping, Eric Marceau, Andrei Y. Khodakov, Anne Griboval-Constant, Fontaine C. La, V. Briois

Chemistry - A European Journal, 2012, 18, pp.2802-2805. ⟨10.1002/chem.201103509⟩. ⟨hal-00687092⟩

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Surface Segregation of Pd from TiO2-Supported AuPd Nanoalloys under CO Oxidation Conditions Observed In situ by ETEM and DRIFTS

Laurent Delannoy, Suzanne Giorgio, Jean-Gabriel Mattei, Claude R. Henry, Nadia El Kolli, Christophe M Éthivier, Catherine Louis

A TiO2-supported AuPd bimetallic catalyst with an Au/Pd atomic ratio of 8 was prepared by deposition-precipitation with urea, and its activity in CO oxidation at room temperature was compared to the one of a monometallic Au/TiO2 catalyst. X-ray photoelectron spectroscopy (XPS) and diffuse…

ChemCatChem, 2013, pp.1-11. ⟨10.1002/cctc.201200618⟩. ⟨hal-00836230⟩

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Total oxidation of propene over Au/xCeO(2)-Al2O3 catalysts: Influence of the CeO2 loading and the activation treatment

Pandian Lakshmanan, Laurent Delannoy, Vincent Richard, Christophe Methivier, Claude Potvin, Catherine Louis

This study explores the reaction of oxidation of propene (1200 ppm) under excess oxygen (9%) over Au/xCeO(2)/Al2O3 catalysts (x = 1.5, 3, 5, and 10 wt% CeO2) to mimic the conditions of VOC decomposition. The present study reveals the influence of several factors that affect the oxidative…

Applied Catalysis B: Environmental, 2010, 96 (1-2), pp.117-125. ⟨10.1016/j.apcatb.2010.02.009⟩. ⟨hal-00604727⟩

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On the origin of the optimum loading of Ag on Al2O3 in the C3H6-SCR of NOx

Tesnim Chaieb, Laurent Delannoy, Catherine Louis, Cyril Thomas

Ag/Al2O3 catalysts synthesized by the common impregnation technique with various Ag loadings were characterized by the NOx-Temperature-Programmed Desorption (TPD) method and their catalytic performances were evaluated in the selective catalytic reduction of NOx by propene (C3H6-SCR). It was found…

Applied Catalysis B: Environmental, 2013, 142-143, pp.780-784. ⟨10.1016/j.apcatb.2013.06.010⟩. ⟨hal-00907584⟩

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Influence of the state of iron on CO oxidation on FeSiBEA zeolite catalysts

Izabela Hnat, Ireneusz Kocemba, Jacek Rynkowski, Thomas Onfroy, Stanislaw Dzwigaj

The influence of the state of iron on the catalytic properties of FexSiBEA zeolite in the oxidation of CO was investigated. Various FexSiBEA zeolites (x = 0.6, 1.0, 4.0 and 10 wt%) were prepared by a two-step post synthesis method. The presence of Fe(III) in tetrahedral coordination for low Fe…

Catalysis Today, 2011, 176, pp.229-233. ⟨10.1016/j.cattod.2010.12.052⟩. ⟨hal-00664469⟩