Laboratoire de réactivité de surface

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  • Article dans une revue

Dynamics of Hydration in Vanadia-Titania Catalysts at Low Loading: A Theoretical and Experimental Study

Anna E. Lewandowska, Monica Catalayud, Frederik Tielens, Miguel A. Banares

The hydration process of dehydrated vanadia-titania catalysts at low loading is investigated using periodic DFT calculations. We focus on the early stages of the hydration process of the vanadia-titania in order to shed light onto the structural and dynamical changes occurring at the molecular…

Journal of Physical Chemistry C, 2011, 115, pp.24133-24142. ⟨10.1021/jp204726b⟩. ⟨hal-00669737⟩

  • Article dans une revue

A comparative study of the catalysis of peptide bonds formation by oxide surfaces

Jean-Francois Lambert, Maguy Jaber, Thomas Georgelin, Lorenzo Stievano

It is well-known that amino acids deposited on some inorganic oxides undergo peptidic condensation. It is seldom realised however that a large diversity of behaviours can be observed in such systems. Here we use the apparently simple case of glycine-non-porous silica as a reference system, in which…

Physical Chemistry Chemical Physics, 2013, 15 (32), pp.13371-13380. ⟨10.1039/C3CP51282G⟩. ⟨hal-00924129⟩

  • Article dans une revue

Ruthenium sulfide clusters in acidic zeolites: in situ XAS characterization during sulfidation and reaction

Juliette Blanchard, Kyoko K. Bando, Takashi Matsui, Masaru Harada, Michèle Breysse, Yuji Yoshimura

In situ XAS at the Ru K edge was used to study the reductive sulfidation (15% H2S/H2) of Ru(NH3)63+ supported on HYd zeolite, and the evolution of the sulfided sample under working conditions (lower H2S partial pressure, addition of toluene to the feed). Sulfidation starts at room temperature and…

Applied Catalysis A : General, 2007, XX, pp.XX. ⟨hal-00112011⟩

  • 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⟩

  • Chapitre d'ouvrage

La Recherche en Chimie aux Frontières de la Connaissance

Dominique Massiot, Claire-Marie Pradier, Jacques Maddaluno, Jean-François Tassin, Joël Moreau, Mehran Mostafavi, Anne Imberty, Pascal Breuilles, Catherine Larroche

L’Unité Mixte de Recherche est la brique élémentaire, souple et pérenne d’un paysage de la recherche en évolution rapide. De nombreux dispositifs viennent structurer l’activité de ces équipes pour faire émerger des pôles de recherche, consolider le maillage des réseaux nationaux, identifier les…, Mixed research units are building blocks, flexible but permanent, in rapidly evolving fields of research. Several measures shape the activities of research teams and thus give rise to “poles of research”. They also help consolidate national networks, identify strong points, boost the sharing of top…

L’industrie Chimique : quel avenir en France ?, 2015, Annales des Mines, 2015, Annales des Mines. Réalités Industrielles. ⟨hal-01228736⟩

  • 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⟩