Laboratoire de réactivité de surface

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  • Article dans une revue

Scanning Electrochemical Microscopy for Investigating Gas Bubble/Liquid Interfaces

Claude Gabrielli, François Huet, Michel Keddam, Philippe Rousseau, Vincent Vivier

Scanning electrochemical microscopy was used to characterize air bubble/electrolyte interfaces for bubbles of diameter in the millimeter range. Contrary to rigid insulated substrate/liquid interfaces, the approach of the tip of the microelectrode was shown to lead to a deformation of the bubble…

Electrochemical and Solid-State Letters, 2003, 6 (10), pp.E23. ⟨10.1149/1.1604971⟩. ⟨hal-04219330⟩

  • Article dans une revue

Enhancing low-temperature activity and durability of Pd-based diesel oxidation catalysts using ZrO2 supports

Mi-Young Kim, Eleni A. Kyriakidou, Jae-Soon Choi, Todd J. Toops, Andrew J. Binder, Cyril Thomas, James E. Parks, Viviane Schwartz, Jihua Chen, Dale K. Hensley

We investigated the impact of ZrO2 on the performance of palladium-based oxidation catalysts with respect to low-temperature activity, hydrothermal stability, and sulfur tolerance. Pd supported on ZrO2 and SiO2 were synthesized for a comparative study. Additionally, in an attempt to maximize the…

Applied Catalysis B: Environmental, 2016, 187, pp.181-194. ⟨10.1016/j.apcatb.2016.01.023⟩. ⟨hal-01264140⟩

  • Article dans une revue

Controlling the reproducibility of Coulomb blockade phenomena for gold nanoparticles on an organic monolayer/silicon system

L Caillard, S Sattayaporn, A-F Lamic-Humblot, S Casale, P Campbell, y J Chabal, Olivier Pluchery

Two types of highly ordered organic layers were prepared on silicon modified with an amine termination for binding gold nanoparticles (AuNPs). These two grafted organic monolayers (GOMs), consisting of alkyl chains with seven or 11 carbon atoms, were grafted on oxide-free Si(111) surfaces as tunnel…

Nanotechnology, 2015, 26 (6), pp.065301. ⟨10.1088/0957-4484/26/6/065301⟩. ⟨hal-01114456⟩

  • Article dans une revue

Aqueous-Phase Preparation of Model HDS Catalysts on Planar Alumina Substrates: Support Effect on Mo Adsorption and Sulfidation

Cédric Bara, Lucie Plais, Kim Larmier, Elodie Devers, Mathieu Digne, Anne-Félicie Lamic-Humblot, Gerhard D. Pirngruber, Xavier Carrier

The role of the oxide support on the structure of the MoS2 active phase (size, morphology, orientation, sulfidation ratio, etc.) remains an open question in hydrotreating catalysis and biomass processing with important industrial implications for the design of improved catalytic formulations. The…

Journal of the American Chemical Society, 2015, 137 (50), pp.15915-15928. ⟨10.1021/jacs.5b10975⟩. ⟨hal-01263787⟩

  • Article dans une revue

Co, Fe and CoFe oxide nanoparticle assemblies within an ordered silica matrix: effects of the metal ions and synthesis pathway on the microstructure and magnetic properties

Laura Altenschmidt, Patricia Beaunier, Eric Rivière, Giulia Fornasieri, Amélie Bordage, Anne Bleuzen

The magnetic properties of nanoparticle assemblies strongly depend on the structural and morphological characteristics of the individual nanoparticles as well as on their organization within the assembly. Here, we present the synthesis of cobalt and/or iron oxide nanoparticles within the ordered…

The European Physical Journal. Special Topics, 2022, ⟨10.1140/epjs/s11734-022-00571-0⟩. ⟨hal-03723932⟩

  • Article dans une revue

Cation Migration and Structural Deformations upon Dehydration of Nickel-Exchanged NaY Zeolite: A Combined Neutron Diffraction and Monte Carlo Study

Wilfried Louisfrema, Jean-Louis Paillaud, Florence Porcher, Elsa Perrin, Thomas Onfroy, Pascale Massiani, Anne Boutin, Benjamin Rotenberg

Combining neutron diffraction and classical molecular simulations, we describe the cation migration and associated structural changes taking place in a Ni-exchanged NaY faujasite zeolite upon stepwise dehydration from room temperature up to 400 °C. The cation redistribution between sites and the…

Journal of Physical Chemistry C, 2016, 120 (32), pp.18115-18125. ⟨10.1021/acs.jpcc.6b05657⟩. ⟨hal-01485629⟩

  • Thèse

Design de composites verts pour la dépollution des terres agricoles : expérience et théorie, Design of green composite for the decontamination of agricultural land : experimental and theoretical

Khaled El Adraa

Des matériaux verts biodégradables à base de Montmorillonite et de cystéine ont été préparés dans le but de co-adsorber des cations de métaux lourds et des polluants émergeants en combinant l’expérience et la théorie (calculs DFT). Les analyses thermiques différentielles ont permis d’estimer le…, Layered silicates like smectites are important soil components. Many works have been devoted to functionalize these materials in order to increase their chelating properties which may help retain heavy metals. It is well known that Cd2+, Hg2+, Pb2+, Co2+ and Zn2+ forms stable complexes with sulfur-…

Chimie-Physique [physics.chem-ph]. Université Pierre et Marie Curie - Paris VI, 2014. Français. ⟨NNT : 2014PA066539⟩. ⟨tel-01134688⟩

  • Article dans une revue

Bioengineering of stainless steel surface by covalent immobilization of enzymes. Physical characterization and interfacial enzymatic activity

Anne Caro, Vincent Humblot, Christophe Methivier, Michel Minier, Lucica Barbes, Joachim Li, Michele Salmain, Claire-Marie Pradier

Two hydrolytic enzymes, namely lysozyme and trypsin, were covalently immobilized onto stainless steel surfaces using wet chemistry processes. The immobilization strategy took advantage of the spontaneous physisorption of the polymer poly(ethylene imine) (PEI) onto stainless steel to yield a firmly…

Journal of Colloid and Interface Science, 2010, 349 (1), pp.13-18. ⟨10.1016/j.jcis.2009.12.001⟩. ⟨hal-00604709⟩

  • Article dans une revue

Exhaust gas recirculation for on-board hydrogen production by isooctane reforming: Comparison of performances of metal/ceria-zirconia based catalysts prepared through pseudo sol-gel or impregnation methods are described

Emmanuelle Ambroise, Claire Courson, Anne-Cecile Roger, Alain Kiennemann, Gilbert Blanchard, Severine Rousseau, Xavier Carrier, Eric Marceau, Camille La Fontaine, Francoise Villain

Isooctane reforming under conditions which are set by exhaust gas can be used to generate H on-board. Isooctane reforming reactivity tests have been performed with bimetallic catalysts Co-noble metal/ceria-zirconia, prepd. either by insertion of transition metal in a ceria-zirconia matrix, either…

Catalysis Today, 2010, 154 (1-2), pp.133-141. ⟨10.1016/j.cattod.2009.12.010⟩. ⟨hal-00604698⟩

  • Article dans une revue

Highly porous and monodisperse magnetic silica beads prepared by a green templating method

Sebastien Abramson, Clementine Meiller, Patricia Beaunier, Vincent Dupuis, Laurent Perrigaud, Agnes Bee, Valerie Cabuil

We describe the prepn. of magnetic silica nanocomposite millimetric beads using alginate as a green biopolymer template. The simple and soft method which is used here is particularly suitable since the alginate template allows a multiscale control of the structure of the material, both its morphol…

Journal of Materials Chemistry, 2010, 20 (23), pp.4916-4924. ⟨10.1039/C000525H⟩. ⟨hal-00604697⟩