Laboratoire de réactivité de surface

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  • Article dans une revue

Group V metal substitution in silicate model zeolites: In search for the active site

Frederik Tielens, Stanislaw Dzwigaj

Group V substituted zeolites were characterized using periodic DFT. It is found that the group V sites in zeolite materials become more hydrophobic and less reducible descending the column of the Period Table. The stable site with T=O group for T = V, transforms into a site with T-OH group for T =…

Chemical Physics Letters, 2010, 501 (1-3), pp.59-63. ⟨10.1016/j.cplett.2010.10.038⟩. ⟨hal-00604803⟩

  • Article dans une revue

Vanadium-containing SBA-15 systems prepared by direct synthesis: physicochemical and catalytic properties in the decomposition of dichloromethane

Marco Piumetti, Barbara Bonelli, Marco Armandi, Lucia Gaberova, Sandra Casale, Pascale Massiani, Edoardo Garrone

Vx/SBA-15 catalysts (V content = 0.7-4.8 wt.%) were directly synthesized and tested for the oxidative decompn. of dichloromethane; impregnation-synthesized SBA-15 and V/SBA-15 catalysts were ref. samples. Catalyst structural and surface properties were characterized by complementary physicochem.…

Microporous and Mesoporous Materials, 2010, 133 (1-3), pp.36-44. ⟨10.1016/j.micromeso.2010.04.011⟩. ⟨hal-00604792⟩

  • Article dans une revue

Quantitative relationship between the nature of surface species and the catalytic activity of tungsten oxides supported on crystallized titania

Thomas Onfroy, Vanessa Lebarbier, Guillaume Clet, Marwan Houalla

A series of WOx/TiO2 catalysts contg. between 0.6 and 3.4 W at./nm2 was prepd. by pore vol. impregnation using ammonium metatungstate soln. on crystd. TiO2. Characterization of the solids by X-ray diffraction and Raman and IR spectroscopy indicated that the W phase was present essentially as a…

Journal of Molecular Catalysis A: Chemical, 2010, 318 (1-2), pp.1-7. ⟨10.1016/j.molcata.2009.11.013⟩. ⟨hal-00604787⟩

  • Article dans une revue

Catalytic Aspects of Light-Induced Hydrogen Generation in Water with TiO2 and Other Photocatalysts: A Simple and Practical Way Towards a Normalization?

Thomas Maschmeyer, Michel Che

Evaluation is discussed of performance of solid photocatalysts for H2 generation from H2O so that they can be compared in a simple way whether sacrificial soln. is used or not. The addnl. chem. potential present in a sacrificial soln. will be the same regardless of the catalyst system used, so…

Angewandte Chemie International Edition, 2010, 49 (9), pp.1536-1539. ⟨10.1002/anie.200903921⟩. ⟨hal-00604779⟩

  • Thèse

Tunable plasmonic substrates for LSPR biosensing, Substrats plasmoniques accordables pour la biodétection LSPR

Daoming Sun

This PhD project was organized into three primary phases: the synthesis and optimization of hollow-structured plasmonic nanoparticles, the fabrication and characterization of glass-based plasmonic sensors, and the application of nanostructured plasmonic platforms for biosensing. First, we refined…, Dans ce travail, nous avons affiné et optimisé un protocole de synthèse bien établi pour les nanocoques d'or, en améliorant leurs propriétés structurelles par le biais de travaux expérimentaux et de simulations afin d'améliorer leurs performances en matière de détection réfractométrique.…

Material chemistry. Sorbonne Université, 2024. English. ⟨NNT : 2024SORUS496⟩. ⟨tel-05058390⟩

  • Article dans une revue

Hydrodesulfurization of 4,6-Dimethyldibenzothiophene and the Diesel Oil Fraction on NiMo Catalysts Supported over Proton-Exchanged AlMCM-41 and TiMCM-41 Extrudates

Karolina Jaroszewska, Marek Lewandowski, Kinga Góra-Marek, Jolanta Grzechowiak, Gérald Djéga-Mariadassou

NiMo catalysts supported on mesoporous MCM-41 type materials shaped with binder were tested for activity in the hydrodesulfurization of 4,6-dimethyldibenzothiophene (4,6-DMDBT) and the diesel fuel fraction (0.92 wt% of sulfur). The aim of the investigation was to evaluate the effect of ion exchange…

Catalysts, 2021, 11 (9), pp.1086. ⟨10.3390/catal11091086⟩. ⟨hal-03371081⟩

  • Article dans une revue

Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion

Katarzyna Świrk, Magnus Rønning, Monika Motak, Patricia Beaunier, Patrick da Costa, Teresa Grzybek

Ce- and Y-promoted double-layered hydroxides were synthesized and tested in dry reforming of methane (CH4/CO2 = 1/1). The characterization of the catalysts was performed using X-ray fluorescence (XRF), X-ray diffraction (XRD), N2 sorption, temperature-programmed reduction in H2 (TPR-H2),…

Catalysts, 2019, 9 (1), pp.56. ⟨10.3390/catal9010056⟩. ⟨hal-02057457⟩

  • Article dans une revue

Covalent Transition Metal Borosilicides: Reaction Pathways in Molten Salts for Water Oxidation Electrocatalysis

Daniel Janisch, Fernando Igoa Saldaña, Edouard de Rolland Dalon, Carlos V. M. Inocêncio, Yang Song, Pierre-Olivier Autran, Antoine Miche, Sandra Casale, David Portehault

The properties of transition metal borides and silicides are intimately linked to the covalent character of the chemical bonds within their crystal structures. Bringing boron and silicon together within metal borosilicides can then engender different competing covalent networks and complex charge…

Journal of the American Chemical Society, 2024, 146 (31), pp.21824-21836. ⟨10.1021/jacs.4c06074⟩. ⟨hal-04754464⟩

  • Article dans une revue

True Circular Dichroism in Optically Active Achiral Metasurfaces and Its Relation to Chiral Near-Fields

Mathieu Nicolas, Per Magnus Walmsness, Jayeeta Amboli, Lu Zhang, Guillaume Demesy, Nicolas Bonod, Souhir Boujday, Morten Kildemo, Bruno Gallas

Optically active achiral metasurfaces offer a promising way to detect chiral molecules based on chiroptic methods. The combination of plasmonic enhanced circular dichroism and reversible optical activity would boost the sensitivity and provide enantiomerselective surfaces while using a single…

ACS Applied Optical Materials, 2023, ⟨10.1021/acsaom.3c00136⟩. ⟨hal-04183908⟩

  • Article dans une revue

Functionalisation of gold surfaces with thiolate SAMs: Topography/bioactivity relationship – A combined FT-RAIRS, AFM and QCM investigation

E. Briand, C. Gu, S. Boujday, M. Salmain, Jean-Marie Herry, C.M. Pradier

Immobilisation of rabbit immunoglobulin G (rIgG) was performed by affinity binding to protein A (PrA) covalently bound to threedifferent thiolate self-assembled monolayers (SAMs), (i) a mixed SAM of mercaptoundecanoic acid (MUA) and mercaptohexanol(C6OH) at a molar ratio of 1–3, (ii) a pure SAM of…

Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2007, 601 (18), pp.3850-3855. ⟨10.1016/j.susc.2007.04.102⟩. ⟨hal-01594332⟩