• Article dans une revue

The similarities and differences in structural characteristics and physico-chemical properties of AgAlBEA and AgSiBEA zeolites

Stanislaw Dzwigaj, Nataliia Popovych, Pavlo Kyriienko, Jean-Marc Krafft, Sergiy Soloviev

AgAlBEA and AgSiBEA zeolites have been prepared by two preparation procedures. The conventional wet impregnation is used to obtain AgAlBEA with silver present mainly in extra-framework position. The two-step postsynthesis procedure which consists of first creating the vacant T-atom sites with…

Microporous and Mesoporous Materials, 2013, 182, pp.16-24. ⟨10.1016/j.micromeso.2013.08.009⟩. ⟨hal-00907753⟩

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BEA zeolite modified with iron as effective catalyst for N2O decomposition and selective reduction of NO with ammonia

Pawel Boron, Lucjan Chmielarz, J. Gurgul, K. Łątka, Tetsuya Shishido, J.M. Krafft, Stanislaw Dzwigaj

BEA zeolite is modified by a two-steps postsynthesis method allowing incorporate iron atoms into the zeolite framework. Two series of the zeolite samples with aluminium (FexAlSiBEA) and without aluminium (FexSiBEA), containing various iron content (0.5-4.0 Fe wt.%) are obtained. For low Fe content…

Applied Catalysis B: Environmental, 2013, 138-139, pp.434-445. ⟨10.1016/j.apcatb.2013.03.022⟩. ⟨hal-00911026⟩

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Remarkable activity of Ag/Al2O3/cordierite catalysts in SCR of NO with ethanol and butanol

Pavlo Kyriienko, Nataliia Popovych, Sergiy Soloviev, Svitlana Orlyk, Stanislaw Dzwigaj

Structured silver-alumina catalysts were prepared by the one-step deposition of Al2O3 directly on the surface of cordierite block matrices with subsequent incipient wetness impregnation of Al2O3/cordierite with an AgNO3 aqueous solution. The catalysts were characterized by BET, XRD, XPS and FTIR…

Applied Catalysis B: Environmental, 2013, 140-141, pp.691-699. ⟨10.1016/j.apcatb.2013.04.067⟩. ⟨hal-00911716⟩

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Identification of the OH groups responsible for kinetic basicity on MgO surfaces by 1H MAS NMR

Céline Chizallet, H. Petitjean, G. Costentin, H. Lauron-Pernot, J. Maquet, Christian Bonhomme, M. Che

Journal of Catalysis, 2009, pp.175-179. ⟨10.1016/J.jcat.2009.09.003⟩. ⟨hal-00446808⟩

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Surface IR immunosensors for label-free detection of benzo[a]pyrene

Souhir Boujday, Soumaya Nasri, Michele Salmain, Claire-Marie Pradier

Polycyclic aromatic hydrocarbons (PAHs) are a family of contaminants originating from the incomplete combustion of organic compounds, present in the urban air, water, soil and also foodstuff. Due to their recognised carcinogenicity, their concentration in urban air is routinely monitored and…

Biosensors & bioelectronics, 2010, 26 (4), pp.1750-1754. ⟨10.1016/j.bios.2010.08.031⟩. ⟨hal-00604705⟩

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Salt concentration and pH-dependent adsorption of two polypeptides on planar and divided alumina surfaces; in situ IR investigations.

Claire-Marie Pradier, Vincent Humblot, Lorenzo Stievano, Christophe Méthivier, Jean-François Lambert

The adsorption of proteins is the first process to take place when a solid is immersed in a biological fluid; though not yet thoroughly understood at a molecular level, this process is also known to be strongly influenced by the presence of salt in solution or by pH changes. In the present work,…

Langmuir, 2007, 23, pp.2463-2471. ⟨10.1021/la062208p⟩. ⟨hal-00138685⟩

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Search for confinement effects in mesoporous supports: hydrogenation of o-xylene on Pt /MCM-41

Franck Letellier, Juliette Blanchard, Katia Fajerwerg, Catherine Louis, Michele Breysse, Denis Guillaume, Denis Uzio

The occurrence in meso-porous supports of a confinement effect related to the adsorption strength of a reaction intermediate on a metallic phase dispersed in the meso pores is examd., as well as its effect on the activity and selectivity. A model is proposed in order to det. the catalyst…

Catalysis Letters, 2006, 110, pp.115-124. ⟨10.1007/s10562-006-0093-z⟩. ⟨hal-00111995⟩

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Influence of the texturalproperties of porousaluminas on the reducibility of Ni/Al2O3 catalysts

Faiza Bentaleb, Eric Marceau

Temperature-programmed reduction (TPR) profiles recorded on calcined Ni/Al2O3 catalysts exhibiting the same Ni(II) surface density (3 Ni2+ nm−2) suggest that nickel speciation and reducibility are significantly influenced by the specific surface area and texturalproperties of aluminas, and by their…

Microporous and Mesoporous Materials, 2012, 156, pp.40-44. ⟨10.1016/j.micromeso.2012.02.018⟩. ⟨hal-00686937⟩

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Impact of sorbitol addition on the structure and performance of silica-supported cobalt catalysts for Fischer-Tropsch synthesis

Hong Jingping, Eric Marceau, Andrei Y. Khodakov, Anne Griboval-Constant, Camille La Fontaine, Françoise Villain, Valérie Briois, P.A. Chernavskii

The paper focuses on the impact of sorbitol addition on the genesis of cobalt active phases in silica-supported catalysts and on their performance in Fischer-Tropsch synthesis. The catalysts were characterized by ex situ and in situ diffuse reflectance spectroscopy in the ultraviolet and visible…

Catalysis Today, 2011, 175 (1), pp.Pages 528-533. ⟨10.1016/j.cattod.2011.03.007⟩. ⟨hal-00663000⟩

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Mesostructured or Alumina-mesostructured Silica SBA-16 as Potential Support for NOx Reduction and Ethanol Oxidation

Maya Boutros, Thomas Onfroy, Patrick da Costa

Synthesis of some meso-structured SiO2 or aluminosilica (SBA-16 and Al-SBA-16) with a 3-dimensional cubic structure is reported. Structural and porosity properties of these materials were studied by x-ray diffraction, N2 sorption, and transmission electron microscopy imaging.; Al insertion was detd…

Catalysis Letters, 2010, 139 (1-2), pp.50-55. ⟨10.1007/s10562-010-0391-3⟩. ⟨hal-00604706⟩