Laboratoire de réactivité de surface

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  • Article dans une revue

Dispersion and hydrogenation activity of surfactant-stabilized Rh(0) nanoparticles prepared on different mesoporous supports

Maya Boutros, Guillaume Shirley, Thomas Onfroy, Franck Launay

Supported Rh(0) colloidal particles were prepared by the reduction of Rh(III) ions by sodium borohydride in the presence of N-N-dimethyl-N-cetyl-N-(2-hydroxyethyl) ammonium chloride (HEA16Cl), usually used as a stabilizing agent in solution. Tested supports were Na-Al-SBA-15, SBA-15 and CMK-3. In…

Applied Catalysis A : General, 2011, 394 (1-2), pp.158-165. ⟨10.1016/j.apcata.2010.12.035⟩. ⟨hal-00602935⟩

  • Article dans une revue

Incorporation of Nb(V) into BEA zeolite investigated by XRD, NMR, IR, DR UV-vis, and XPS

Stanislaw Dzwigaj, Yannick Millot, Christophe Methivier, Michel Che

Nb(x)SiBEA (x = 1.0, 1.5 Nb wt%) zeolites are prepared by a two-step postsynthesis method involving first the creation of vacant T-atom sites associated with silanol groups by dealumination of BEA zeolite by nitric acid solution and then by impregnation of the resulting SiBEA zeolite with the…

Microporous and Mesoporous Materials, 2010, 130 (1-3), pp.162-166. ⟨10.1016/j.micromeso.2009.10.027⟩. ⟨hal-00604714⟩

  • Article dans une revue

Formation of heteropolymolybdates during the preparation of Mo and NiMo HDS catalysts supported on SBA-15: Influence on the dispersion of the active phase and on the HDS activity

Alvaro Sampieri, Stephane Pronier, Sylvette Brunet, Xavier Carrier, Catherine Louis, Juliette Blanchard, Katia Fajerwerg, Michele Breysse

Mo and Ni-Mo sulfides in SBA-15 and Al-SBA-15 catalysts were prepd. by incipient wetness co-impregnation of molybdenum and nickel precursors (followed by thermal treatment under He at 823 K) and sulfidation under 10% H2S/H2 at 673 K. Only incipient wetness impregnation of Mo on pure silica SBA-15…

Microporous and Mesoporous Materials, 2010, 130 (1-3), pp.130-141. ⟨10.1016/j.micromeso.2009.10.024⟩. ⟨hal-00604795⟩

  • Article dans une revue

Stochastic Simulation and Single Events Kinetic Modeling: Application to Olefin Oligomerization

Javad Sharouzi, Denis Guillaume, Pierre Rouchon, Patrick da Costa

In order to handle a tractable network for complex reaction systems such as oligomerization, stochastic tools are applied to reduce the reaction mechanism. The particularity of this work is that quantitative single event kinetic modeling constants are used to generate a network which correctly…

Industrial and engineering chemistry research, 2008, pp.4308-4316. ⟨10.1021/ie071215l⟩. ⟨hal-00449235⟩

  • Article dans une revue

Ab initio study of the hydroxylated surface of amorphous silica : a representative model.

Frederik Tielens, Christel Gervais, Jean François Lambert, Francesco Mauri, Dominique Costa

A new complete, representative model for the hydroxylated surface of amorphous silica is presented and characterized by means of periodic DFT calculations. This model accounts for the experimentally encountered ring size distribution, Si-O-Si and O-Si-O angles, silanols density, and distribution (…

Chemistry of Materials, 2008, 20 (10), pp.3336-3344. ⟨10.1021/cm8001173⟩. ⟨hal-00347955⟩

  • Article dans une revue

Electrodeposition of Ni-Co alloys from neat protic ionic liquid: Application to the hydrogen evolution reaction

Yuelin Xie, Antoine Miche, Vincent Vivier, Mireille Turmine

Amorphous and nanocrystalline Ni-Co alloys have been deposited on FTO glass in ethylammonium nitrate (EAN), a protic ionic liquid (PIL). The physicochemical properties of EAN with Ni 2+ and Co 2+ salts have been studied as well as the electrochemical behavior of these metal cations in the PIL in…

Applied Surface Science, 2023, 635, pp.157693. ⟨10.1016/j.apsusc.2023.157693⟩. ⟨hal-04294185⟩

  • Article dans une revue

An easy way to obtain thin gold film on silica glass substrate by chemical method

Anne-Félicie Lamic-Humblot, Sandra Casale, Cédric Leger, S. Alpérine, Catherine Louis

Physical methods of metal deposition under ultra-high vacuum conditions are currently used to manufacture electrically conductive surfaces. In the case of silica glass, a supplementary oxide layer is usually required to avoid the uncontrolled growth of metal nanoparticles on the surface. Here, we…

Thin Solid Films, 2013, 539, pp.151-153. ⟨10.1016/j.tsf.2013.05.085⟩. ⟨hal-00907371⟩

  • Article dans une revue

Incorporation of Mo into the Vacant T-Atom Sites of the Framework of BEA Zeolite as Mononuclear Mo Evidenced by XRD and FTIR, NMR, EPR, and DR UV-Vis Spectroscopies

Rafal Baran, Frédéric Averseng, Yannick Millot, Thomas Onfroy, Sandra Casale, Stanislaw Dzwigaj

A MoSiBEA zeolite has been prepared by a two-step postsynthesis procedure that consists of first creating the vacant T-atom sites with associated silanol groups by treatment of TEABEA zeolite with nitric acid and then incorporating Mo ions into the vacant T-atom sites by solid-state ion exchange at…

Journal of Physical Chemistry C, 2014, 118, pp.4143-4150. ⟨10.1021/jp410016g⟩. ⟨hal-00983714⟩

  • Article dans une revue

Total Oxidation of Methane on Oxide and Mixed Oxide Ceria-Containing Catalysts

Marius Stoian, Vincent Rogé, Liliana Lazar, Thomas Maurer, Jacques C Védrine, Ioan-Cezar Marcu, Ioana Fechete

Methane, discovered in 1766 by Alessandro Volta, is an attractive energy source because of its high heat of combustion per mole of carbon dioxide. However, methane is the most abundant hydrocarbon in the atmosphere and is an important greenhouse gas, with a 21-fold greater relative radiative…

Catalysts, 2021, 11 (4), pp.427. ⟨10.3390/catal11040427⟩. ⟨hal-03236104⟩

  • Article dans une revue

Potential of electrochemical techniques (macro and microelectrodes) in fronth flotation concentration of sulfide minerals, Potencialidade das técnicas eletroquímicas (macro e microeletrodos) na concentração por flotação de minerais sulfetados

Marina Martins Mennucci, Tatiana Mallet Machado, Vincent Vivier, Hercílio Gomes De Melo, Jean Vicente Ferrari

ABSTRACT The interactions between sulfide minerals and the chemistry of the exposure medium, from the grinding process to the flotation pulp, can be electrochemical and/or galvanic and influence the hydrophobicity of their surfaces, resulting in different levels of recovery. In the literature, most…, RESUMO As interações entre os minerais sulfetados e a química do meio de exposição, desde o processo de moagem dos minérios até a polpa de flotação, podem ser de caráter eletroquímico e/ou de natureza galvânica e influenciam a hidrofobicidade de suas superfícies, resultando em diferentes níveis de…

Revista Matéria, 2022, 27 (1), pp.e13151. ⟨10.1590/S1517-707620220001.1351⟩. ⟨hal-03720585⟩