Laboratoire de réactivité de surface

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  • Communication dans un congrès

In situ XAFS study of the thioresistance of metallic Ru supported on HYd zeolite

Juliette Blanchard, K. Kyoko Bando, Christophe Geantet, Takashi Matsui, Michèle Breysse, Yuji Yoshimura

In situ XAFS at the Ru K edge was used to investigate the reduction of Ru(NH3)63+ supported on HYd zeolite, and the evolution of the reduced sample in the presence of sulfur (350 ppm and 2%H2S/H2) at 523K. After reduction at 673K very small Ru° nanoparticules are formed which interact strongly with…

TOCAT5, Jul 2006, Tokyo, Japan. ⟨hal-00112012⟩

  • Article dans une revue

Giant Exchange-Bias in Polyol-Made CoFe2O4-CoO Core-Shell Like Nanoparticles

Nancy Flores-Martinez, Giulia Franceschin, Thomas Gaudisson, Patricia Beaunier, Nader Yaacoub, Jean-Marc Greneche, Raul Valenzuela, Souad Ammar

Cobalt ferrite ferrimagnetic nanoparticles (NPs) are prepared and used in this work as seeds to grow a thin antiferromagnetic poly- and nanocrystalline CoO shell. The major purpose is to study systematically the characteristics of the as-produced powders, making emphasis on their internal…

Particle & Particle Systems Characterization, 2018, 35 (11), pp.1800290. ⟨10.1002/ppsc.201800290⟩. ⟨hal-02114586⟩

  • Article dans une revue

Catalytic behaviour of hybrid LNT/SCR systems: Reactivity and in situ FTIR study

L. Castoldi, R. Bonzi, L. Lietti, P. Forzatti, S. Morandi, G. Ghiotti, S. Dzwigaj

The NOx storage-reduction over the single Pt-Ba/Al2O3 and Fe-ZSM-5 systems and over the hybrid Pt-Ba/Al2O3 + Fe-ZSM-5 systems, both physically mixed and in dual bed configuration with the SCR catalyst placed downstream of the LNT catalyst, is systematically investigated by Isothermal Step…

Journal of Catalysis, 2011, 282, pp.128-144. ⟨10.1016/j.cat.2011.06.002⟩. ⟨hal-00664960⟩

  • Article dans une revue

Identification of the silver state in the framework of Ag-containing zeolite by XRD, FTIR, photoluminescence, 109 Ag NMR, EPR, DR UV-vis, TEM and XPS investigations

Nataliia Popovych, Pavlo Kyriienko, Sergiy Soloviev, Rafal Baran, Yannick Millot, Stanislaw Dzwigaj

Silver has been identified in the framework of AgxSiBEA zeolites (where x = 3–6 Ag wt%) by the combined use of XRD, 109Ag MAS NMR, FTIR, diffuse reflectance UV-visible, EPR and XPS spectroscopy. The incorporation of Ag ions into the framework of SiBEA zeolite has been evidenced by XRD. The…

Physical Chemistry Chemical Physics, 2016, 18, pp.29458-29465. ⟨10.1039/c6cp05263k⟩. ⟨hal-01387417⟩

  • Article dans une revue

Acidity versus metal-induced Lewis acidity in zeolites for Friedel–Crafts acylation

Claire Bernardon, Manel Ben Osman, Guillaume Laugel, Benoît Louis, Patrick Pale

Acid catalysts including Ni, Ag and Fe-loaded zeolites of different structures were prepared either via cationic exchange or impregnation techniques from pristine H-zeolites (BEA, and MFI). Their catalytic activity was evaluated in the liquid-phase Friedel–Crafts acylation of anisole with propanoic…, Des cations métalliques (Ni, Ag et Fe) ont été incorporés au sein de zéolithes BEA et ZSM-5 par des techniques d'échange cationique et d'imprégnation afin d'obtenir de nouveaux catalyseurs acides solides. Ces matériaux ont ensuite été testés dans une réaction d'acylation de…

Comptes Rendus Chimie , 2017, ⟨10.1016/j.crci.2016.03.008⟩. ⟨hal-01303352⟩

  • Article dans une revue

A Graftable Quaternary Ammonium Biocidal Polymer Reduces Biofilm Formation and Ensures Biocompatibility of Medical Devices

Houssam Bouloussa, Azzam Saleh‐mghir, Claire Valotteau, Chahrazad Cherifi, Narjès Hafsia, Martine Cohen‐solal, Charles Court, Anne‐claude Crémieux, Vincent Humblot

A quaternized polyvinylpyridine (Q‐PVP) polymer methanolic solution synthesized in a single step is used to covalently graft titanium surfaces. Q‐PVP is quaternized with varying N+/N ratios. 1 cm2 pure titanium plates are polished and activated. Treated samples are grafted by spin coating or dip‐…

Advanced Materials Interfaces, 2021, pp.2001516. ⟨10.1002/admi.202001516⟩. ⟨hal-03155802⟩

  • Article dans une revue

Probing the Orientation of β-Lactoglobulin on Gold Surfaces Modified by Alkyl Thiol Self-Assembled Monolayers

Victor Lebec, Jessem Landoulsi, Souhir Boujday, C. Poleunis, Claire-Marie Pradier, A. Delcorte

The adsorption of a globular protein on chemically well controlled surfaces was investigated in order to correlate its orientation to the surface properties. To this end, three different alkyl thiols, differing by their end group (−COOH, −CH3, and −NH2), were used to build up self-assembled…

Journal of Physical Chemistry C, 2013, 117, pp.11569-11577. ⟨10.1021/jp311964g⟩. ⟨hal-00918524⟩

  • Article dans une revue

Supported Cu Nanoparticles as Selective and Stable Catalysts for the Gas Phase Hydrogenation of 1,3-Butadiene in Alkene-Rich Feeds

Giorgio Totarella, Rolf Beerthuis, Nazila Masoud, Catherine Louis, Laurent Delannoy, Petra de Jongh

Supported copper nanoparticles are a promising alternative to supported noble metal catalysts, in particular for the selective gas phase hydrogenation of polyunsaturated molecules. In this article, the catalytic performance of copper nanoparticles (3 and 7 nm) supported on either silica gel or…

Journal of Physical Chemistry C, 2021, 125 (1), pp.366-375. ⟨10.1021/acs.jpcc.0c08077⟩. ⟨hal-03995579⟩

  • Article dans une revue

Ga(Nb,Ta)SiBEA zeolites prepared by two-step postsynthesis method: acid–base characteristics and catalytic performance in the dehydrogenation of propane to propylene with CO2

S. Orlyk, M. Kantserova, V. Chedryk, P. Kyriienko, D. Balakin, Y. Millot, S. Dzwigaj

Ga(Ta,Nb)SiBEA zeolites with Ta(V), Nb(V) and Ga(III)-single sites were prepared by two-step post-synthesis preparation procedure as evidenced by X-ray Diffraction, Fourier Transform Infrared Spectroscopy (FT–IR), 71Ga Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy and X-ray…

Journal of Porous Materials, 2021, 28 (5), pp.1511-1522. ⟨10.1007/s10934-021-01099-9⟩. ⟨hal-03995330⟩

  • Article dans une revue

PdAg nanoparticles and aminopolymer confined within mesoporous hollow carbon spheres as an efficient catalyst for hydrogenation of CO 2 to formate

Guoxiang Yang, Yasutaka Kuwahara, Shinya Masuda, Kohsuke Mori, Catherine Louis, Hiromi Yamashita

PdAg alloy nanoparticles and aminopolymer dispersed in hollow structured carbon catalysts exhibit high activity and stability for CO 2 hydrogenation.

Journal of Materials Chemistry A, 2020, 8 (8), pp.4437-4446. ⟨10.1039/c9ta13389e⟩. ⟨hal-03995337⟩