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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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Optimized immobilization of gold nanoparticles on planar surfaces through alkyldithiols and their use to build 3D biosensors

Anne-Laure Morel, Rose-Marie Volmant, Christophe Methivier, Jean-Marc Krafft, Souhir Boujday, Claire-Marie Pradier

This paper describes a controlled way to immobilize gold nanoparticles on planar gold surfaces and the use of the resulting 3D platform to build up a 3D biosensor. The surface was first functionalized by grafting hexanedithiol, this molecule has 2 thiol end groups, which enables its chemical…

Colloids and Surfaces B: Biointerfaces, 2010, 81 (1), pp.304-312. ⟨10.1016/j.colsurfb.2010.07.021⟩. ⟨hal-00604782⟩

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N-Methylephedrium Salts as Chiral Surfactants for Asymmetric Hydrogenation in Neat Water with Rhodium(0) Nanocatalysts

Elodie Guyonnet Bile, Audrey Denicourt-Nowicki, Rita Sassine, Patricia Beaunier, Franck Launay, Alain Roucoux

Synthesis of a water-sol. family of optically active N-methylephedrium salts NMeEph12X I [X = Br, HCO3, (S)-lactate] that can be used as efficient protective agents of metallic nanoparticles in neat water was described. The resulting materials were evaluated in the asym. hydrogenation of…

ChemSusChem, 2010, 3 (11), pp.1276-1279. ⟨10.1002/cssc.201000206⟩. ⟨hal-00604720⟩

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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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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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A simple thermodynamic approach to predict responses from polymer-coated quartz crystal microbalance sensors exposed to organic vapors.

P. Palmas, J. Klingenfus, A. Vedeau, E. Girard, P. Montméat, L. Hairault, C.M. Pradier, C. Methivier

As of lately, the demand for developing artificial sensors with improved capabilities for the detection of explosives, toxics or drugs has increased. Ideally, sensor devices should provide high sensitivity and give a response that is specific to a given target molecule without being influenced by…

Talanta, 2013, 115, pp.616-623. ⟨10.1016/j.talanta.2013.06.017⟩. ⟨hal-00958092⟩

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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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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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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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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⟩