Laboratoire de réactivité de surface

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  • Article dans une revue

Ta(V)-Single Site BEA Zeolite by Two-Step Postsynthesis Method: Preparation and Characterization

Stanislaw Dzwigaj, Yannick Millot, Michel Che

Ta(1.0)SiBEA and Ta(2.0)SiBEA 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 TEABEA zeolite with nitric acid and then the impregnation of the resulting SiBEA zeolite with tantalum…

Catalysis Letters, 2010, 135 (3-4), pp.169-174. ⟨10.1007/s10562-010-0284-5⟩. ⟨hal-00604713⟩

  • Article dans une revue

Active Site Design in a Core-Shell Nanostructured Catalyst for a One-Pot Oxidation Reaction

Shusuke Okada, Kohsuke Mori, Takashi Kamegawa, Michel Che, Hiromi Yamashita

Designing an active site: A new type of core-shell structured catalyst was prepared, with a uniform SiO2 core supporting Pd nanoparticles (NPs) covered with a Ti-containing mesoporous silica shell. Generated H2O2 on the inner Pd NP site could interact with the Ti oxide moieties within the mesopores…

Chemistry - A European Journal, 2011, 17 (33), pp.9047-9051. ⟨10.1002/chem.201101241⟩. ⟨hal-00663357⟩

  • Article dans une revue

Toward redox framework single site zeolite catalysts

Stanislaw Dziwag, Michel Che

This paper concerns heterogeneous single site catalysts which are difficult to prepare because of speciation problems related to the two starting components, the solid and the metal precursor solution. A two-step post-synthesis method is used to prepare the V-SiBEA reference system, with vanadium…

Catalysis Today, 2011, 169, pp.232-241. ⟨10.1016/j.cattod.2011.01.035⟩. ⟨hal-00664504⟩

  • Article dans une revue

Piezoelectricimmunosensor for direct and rapiddetection of staphylococcal enterotoxin A (SEA) at the ng level

Michèle Salmain, Mahsa Ghasemi, Souhir Boujday, Jolanda Spadavecchia, Marie-Clarisse Techer, Florence Val, Vincent Le Moigne, M. Gautier, Romain Briandet, Claire-Marie Pradier

A direct, label-free immunosensor was designed for the rapiddetection and quantification of staphylococcal enterotoxin A (SEA) in buffered solutions using quartz crystal microbalance with dissipation (QCM-D) as transduction method. The sensing layer including the anti-SEA antibody was constructed…

Biosensors and Bioelectronics, 2011, 29 (1), pp.140-144. ⟨10.1016/j.bios.2011.08.007⟩. ⟨hal-00680966⟩

  • Article dans une revue

Synthesis and grafting of a BTP derivative onto a quartz crystal microbalance for lanthanide detection

Dimitri Mercier, Nicolas Leconte, Christophe Methivier, Franck Suzenet, G?ld Guillaumet, Anne Wuillaume, Claire-Marie Pradier

The ability of bis-triazinylpyridine (BTP) molecules to complex lanthanides is well-known in solution and can be judiciously utilized to elaborate solid sensing surfaces. This was done by synthesizing a new BTP derivative and covalently anchoring it onto gold surfaces. The BTP grafting, its…

Physical Chemistry Chemical Physics, 2010, 12 (23), pp.6099-6106. ⟨10.1039/b921389a⟩. ⟨hal-00604780⟩

  • Article dans une revue

Investigation of oxide catalysts activity in the NOx neutralization with organic reductants

W. Turek, A. Plis, Patrick da Costa, A. Krzton

Temp.-programmed desorption of NO (TPD) and temp.-programmed redn. of NO by propene and ethanol (TPSR) over the catalyst with redox properties and the structure of spinels - Co3O4 and CoFe2O4 - were investigated. The TPD expts. can det. the temp. range in which the deNOx proceeds and provide…

Applied Surface Science, 2010, 256 (17), pp.5572-5575. ⟨10.1016/j.apsusc.2009.12.149⟩. ⟨hal-00604810⟩

  • Article dans une revue

Probing acid-base sites in vanadium redox zeolites by DFT calculation and compared with FTIR results

Frederik Tielens, Stanislaw Dzwigaj

Ab initio periodic DFT calculations in combination with experimental FTIR of adsorption pyridine investigations have been used to study the acid-base properties of vanadium doped zeolite materials. It is evidenced that VO-H groups of V(V) and V(IV) framework sites are more acidic than SiO-H groups…

Catalysis Today, 2010, 152 (1-4), pp.66-69. ⟨10.1016/j.cattod.2009.09.006⟩. ⟨hal-00604806⟩

  • Article dans une revue

Basic reactivity of CaO: investigating active sites under operating conditions

Hugo Petitjean, Celine Chizallet, Jean-Marc Krafft, Michel Che, Helene Lauron-Pernot, Guylene Costentin

A set of CaO samples was prepared from thermal decomposition of several precursors, leading to very different surface properties. During storage, CaO samples rehydrated quickly but reversibly. Before characterization, the samples were pre-treated at 1023 K under nitrogen flow to obtain CaO as the…

Physical Chemistry Chemical Physics, 2010, 12 (44), pp.14740-14748. ⟨10.1039/c0cp00855a⟩. ⟨hal-00604790⟩

  • Article dans une revue

Mesoporous materials from zeolite seeds as supports for nickel tungsten sulfide active phases Part 1. Characterization and catalytic properties in hydrocracking reactions

Shuangqin Zeng, Juliette Blanchard, Michèle Breysse, Dadong Li, Hong Nie, Yahua Shib, Xintian Su

MCM-41 aluminosilicate mesostructures (Si/Al = 18) with hexagonal long-range order were assembled from protozeolitic nanoclusters (zeolite seeds) that normally nucleate the crystn. of b-zeolite (BEA). Depending on the duration of the thermal treatment leading to the zeolite seeds, different acidic…

Applied Catalysis A : General, 2005, 294, pp.59-67. ⟨10.1016/j.apcata.2005.07.015⟩. ⟨hal-00080297⟩

  • Article dans une revue

Catalytic performances of platinum doped molybdenum carbide for simultaneous hydrodenitrogenation and hydrodesulfurization

Marek Lewandowski, Agnieszka Szymanska-Kolasa, Patrick da Costa, Celine Sayag

The hydrotreating activity of molybdenum carbide doped with platinum (0.3 wt.%) was studied and compared to that of a pure, non-modified Mo2C. 4,6-Dimethyldibenzothiophene (4,6-DMDBT, 300 ppm of S) and carbazole (100 ppm of N) were designated as model compounds and subjected to hydrodesufurization…

Catalysis Today, 2006, 119, pp.31-34. ⟨10.1016/j.cattod.2006.08.062⟩. ⟨hal-00128076⟩