Laboratoire de réactivité de surface

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  • Article dans une revue

Hierarchical Self-Assembly of Polyoxometalate-Based Hybrids Driven by Metal Coordination and Electrostatic Interactions: From Discrete Supramolecular Species to Dense Monodisperse Nanoparticles

Guillaume Izzet, Benjamin Abécassis, Dalil Brouri, Madeleine Piot, Benjamin Matt, Stefano Artin Serapian, Carles Bo, Anna Proust

The metal-driven self-assembly processes of a covalent polyoxometalate (POM)-based hybrid bearing remote terpyridine binding sites have been investigated. In a strongly dissociating solvent, a discrete metallomacrocycle, described as a molecular triangle, is formed and characterized by 2D diffusion…

Journal of the American Chemical Society, 2016, 138 (15), pp.5093 - 5099. ⟨10.1021/jacs.6b00972⟩. ⟨hal-01548125⟩

  • Article dans une revue

Improved activity and stability in CO oxidation of bimetallic Au-Cu/TiO2 catalysts prepared by deposition-precipitation with urea

A. Sandoval, Catherine Louis, Rodolfo Zanello

Au-Cu bimetallic catalysts supported on TiO2 were prepared for the first time by sequential deposition-precipitation with the urea method, copper first then gold. Au-Cu catalysts with four different Au:Cu atomic ratios were synthesized (1:0.4 to 1:1.2). This method allowed quantitative deposition…

Applied Catalysis B: Environmental, 2013, 140-141, pp.363-377. ⟨10.1016/j.apcatb.2013.04.039⟩. ⟨hal-00911705⟩

  • Article dans une revue

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⟩

  • Article dans une revue

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⟩

  • Article dans une revue

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⟩

  • Article dans une revue

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⟩

  • Article dans une revue

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⟩

  • Article dans une revue

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⟩

  • Article dans une revue

Self-Assembling of Redox-Active Atrazine Poly(ethylenimine) Conjugates – Interfacial Electrochemical and Spectroscopic Characterization

Zhaohui Chen, Michèle Salmain, Claire-Marie Pradier, Nathalie Fischer-Durand, Alain Pailleret, Féthi Bedioui, Sandrine Zanna

Thin films of polymers tethered with both atrazine haptens and ferrocenyl (Fc) probes were formed on polycrystalline gold electrodes by taking advantage of the facile formation of self-assembled monolayers (SAMs) of thiolates. These films were characterized by polarization modulation Fourier…

Electroanalysis, 2006, 18 (7), pp.684-694. ⟨10.1002/elan.200503451⟩. ⟨inserm-00194708⟩

  • Article dans une revue

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⟩