Laboratoire de réactivité de surface

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  • Article dans une revue

On the kinetics of CO oxidation by O2 over RhI(CO)2 catalytic species anchored to a zeolitic support

Céline Fontaine-Gautrelet, Cyril Thomas, Jean-Marc Krafft, Gérald Djéga-Mariadassou

The reactivity of RhI(CO)2 towards CO oxidation was studied on a model Rh(0.7 wt%)/HY material. The kinetic results show that RhI(CO)2 exhibit a fairly low activity. It is therefore suggested that the catalytic species responsible for the enhanced activity of Rh/Ce0.68Zr0.32O2 [Manuel et al., J.…

Topics in Catalysis, 2007, 42-43, pp.357-361. ⟨10.1007/s11244-007-0205-z⟩. ⟨hal-00157007⟩

  • Article dans une revue

Comparison of molybdenum carbide and tungsten carbide for the hydrodesulfurization of dibenzothiophene

Agnieszka Szymanska-Kolasa, Marek Lewandowski, Celine Sayag, G. Djéga-Mariadassou

The molybdenum and tungsten carbides (Mo2C and W2C) were synthesized, characterized and tested in hydrodesulfurization (HDS) of dibenzothiophene (DBT). The phase purity of these catalysts was established by X-ray diffraction (XRD), and the surface properties were determined by N2 BET specific…

Catalysis Today, 2006, 119, pp.7-12. ⟨10.1016/j.cattod.2006.08.021⟩. ⟨hal-00128084⟩

  • Article dans une revue

Transformations of γ-alumina in aqueous suspensions. 1. Alumina chemical weathering studied as a function of pH

Xavier Carrier, Eric Marceau, Jean-François Lambert, Michel Che

Hydration of γ-Al2O3 is often reported to occur via the superficial transformation of the alumina surface into alumina hydroxide-like layers. However, very little evidence has been given so far to support this hypothesis. It is demonstrated here by X-ray diffraction, TEM, electron diffraction and…

Journal of Colloid and Interface Science, 2007, 308, pp.429-437. ⟨10.1016/j.jcis.2006.12.074⟩. ⟨hal-00133775⟩

  • Article dans une revue

On the clarification of the IR stretching vibration assignment of adsorbed N2 on Rh0 and Rhd+ surface atoms of supported Rh crystallites

Céline Fontaine-Gautrelet, Jean-Marc Krafft, Gérald Djéga-Mariadassou, Cyril Thomas

The low temperature adsorption of N2 on Rh/SiO2 samples of various particle-size distributions was followed by FTIR. The addition of O2 pulses on Rh0 surfaces saturated with chemisorbed N2 allowed us to reassign stretching frequencies attributed originally to N2-Rh0 to N2-RhΔ+. The formation of the…

Journal of Physical Chemistry B, 2006, 110, pp.10075-10081. ⟨10.1021/jp061077y⟩. ⟨hal-00079961⟩

  • Communication dans un congrès

DÉTERMINANTS DU MAUVAIS CONTROLE DE LA PRESSION ARTÉRIELLE CHEZ LES HYPERTENDUS TRAITÉS - L’ÉTUDE CONSTANCES

Michelle Cherfane, A. Vallée,, Sofiane Kab, Marcel Goldberg, Marie Zins, Jacques Blacher

Objectifs: Uncontrolled hypertension is common among treated hypertensive individuals and factors influencing blood pressure (BP) control are important to be identified. We aimed to assess determinants of poor BP control among treated hypertensive individuals from the CONSTANCES cohort French study…

Les Journées de l’Hypertension Artérielle (JHTA), Dec 2019, Paris, France. ⟨hal-05572952⟩

  • Chapitre d'ouvrage

Influence of Large Magnetic Field Gradients at the Electrochemical Interface

Jinu Kurian, Peter Dunne, Vincent Vivier, Gwenael Atcheson, Ruslan Salikhov, Ciaran Fowley, Munuswamy Venkatesan, Olav Hellwig, Michael Coey, Bernard Doudin

We investigate how a model single-electron-exchange electrochemical reaction can be influenced by a magnetic field, B, which is a combination of an external applied field and the stray field generated by a Co/Pt multilayer thin film stack with preferred perpendicular magnetization. The Lorentz…

Bernard Doudin; Michael Coey; Andrejs Cēbers. Magnetic Microhydrodynamics: An Emerging Research Field, 120, Springer, pp.111--130, 2024, Topics in Applied Physics, 978-3-031-58375-9. ⟨10.1007/978-3-031-58376-6_9⟩. ⟨hal-04956800⟩

  • Article dans une revue

Methanol oxidation on VSiBEA zeolites: Influence of V content on the catalytic properties

Marciej Tredja, Maria Ziolek, Yannick Millot, Karolina Chalupka, Michel Che, Stanislaw Dziwag

This study deals with the influence of V content on the catalytic properties of VxSiBEA zeolites in the oxidation of methanol. The samples are prepared following a postsynthesis method reported earlier (S. Dzwigaj, M.J. Peltre, P. Massiani, A. Davidson, M. Che, T. Sen, S. Sivasanker, Chem. Commun…

Journal of Catalysis, 2011, 281 (1), pp.169-176. ⟨10.1016/j.jcat.2011.04.013⟩. ⟨hal-00663368⟩

  • Article dans une revue

Effect of vanadium dispersion and support properties on the catalytic activity of V-SBA-15 and V-MCF mesoporous materials prepared by direct synthesis

Marco Piumetti, Barbara Bonelli, Pascale Massiani, Stanislaw Dzwigaj, Llenia Rossetti, Sandra Casale, Lucia Gaberova, Marco Armandi, Edorado Garrone

Direct synthesis route was developed to support TiO2-ZrO2 binary metal oxide onto the carbon templated mesoporous silicalite-1 (CS-1). Metal hydroxide modified carbon particles could play a role as hard template and simultaneously support metal components on the mesopores during the crystallization…

Catalysis Today, 2011, 176, pp.458-464. ⟨10.1016/j.cattod.2010.10.066⟩. ⟨hal-00667426⟩

  • Article dans une revue

New insights into the development of Brønsted acidity of niobic acid

Vanessa Lebarbier, Marwan Houalla, Thomas Onfroy

The development of Brønsted acidity and the relationship between acidity, catalytic performance and structure of niobium oxide were investigated for a series of samples prepared by calcination of niobic acid at temperatures between 423 and 823 K. All solids were active for propan-2-ol dehydration.…

Catalysis Today, 2012, 192, pp.123-129. ⟨10.1016/j.cattod.2012.02.061⟩. ⟨hal-00745977⟩

  • Article dans une revue

Surface plasmon resonance biosensors incorporating gold nanoparticles.

Erin Bedford, Jolanda Spadavecchia, Claire-Marie Pradier, Frank Gu

SPR biosensing is increasingly popular for the detection of a multitude of biomolecules. It offers label-free detection and study of proteins, nucleic acids, and other biomolecules in real time. A recent trend involves incorporation of AuNPs, either within the sensing surface itself or as signal…

Macromolecular Bioscience, 2012, 12, pp.724-739. ⟨10.1002/mabi.201100435⟩. ⟨hal-00745836⟩