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  • Article dans une revue

Electrochemistry of a new carbon-rich fluorine-doped tin oxide (CFTO) material as a powder electrode in chloride electrolytes

Chantal Cachet, Hubert Cachet, B Jousseaume, T Toupance, Vincent Vivier

The electrochemical behavior of a conductive carbon-rich fluorine-doped tin oxide (CFTO) powder synthesized via the sol–gel process was investigated by studying the chloride oxidation reaction in aqueous media with the help of a cavity microelectrode (CME) without any binding additive. This new…

Electrochimica Acta, 2002, 47 (9), pp.1385-1394. ⟨10.1016/S0013-4686(01)00873-8⟩. ⟨hal-04228572⟩

  • Article dans une revue

The Impact of Reduction Temperature and Nanoparticles Size on the Catalytic Activity of Cobalt-Containing BEA Zeolite in Fischer–Tropsch Synthesis

Karolina A Chalupka, Jacek Grams, Pawel Mierczynski, Malgorzata I Szynkowska, Jacek Rynkowski, Thomas Onfroy, Sandra Casale, Stanislaw Dzwigaj

A goal of this work was to investigate the influence of the preparation procedure and activation conditions (reduction temperature and reducing medium: pure hydrogen (100% H 2) or hydrogen-argon mixture (5% H 2-95% Ar)) on the activity of Co-containing BEA zeolites in Fischer-Tropsch synthesis.…

Catalysts, 2020, 10 (5), pp.553. ⟨10.3390/catal10050553⟩. ⟨hal-03987087⟩

  • Article dans une revue

Tunable hierarchical porous silica materials using hydrothermal sedimentation-aggregation technique

Abdelali Zaki, Jing Xu, Grégory Stoclet, Sandra Casale, Jean-Philippe Dacquin, Pascal Granger

Herein, a simple and efficient synthesis based on a dual templating approach allow the preparation of tunable macroporous mesoporous silica materials. Macropores incorporation has been obtained using polymer spheres of well-defined size and their subsequent removal by thermal treatment allowed the…

Microporous and Mesoporous Materials, 2015, Microporous and Mesoporous Materials, 208, pp.140-151. ⟨10.1016/j.micromeso.2015.01.041⟩. ⟨hal-03033078⟩

  • Article dans une revue

How to determine IR molar absorption coefficients of co-adsorbed species? Application to methanol adsorption for quantification of MgO basic sites

Béatrice Moulin, Laetitia Oliviero, Philippe Bazin, Marco Daturi, Guylène Costentin, Françoise Maugé

Methanol adsorption on MgO samples with different morphologies is studied by infrared (IR) spectroscopy coupled to volumetry or thermogravimetry measurements to probe qualitatively and quantitatively the acid-base paired sites. The molar absorption coefficients of [small nu](OC) vibration of non-…

Physical Chemistry Chemical Physics, 2011, 13 (22), pp.10797-10807. ⟨10.1039/C0CP02767G⟩. ⟨hal-00639308⟩

  • 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⟩

  • Thèse

New routes of preparation of active and stable mesoporous Ni-alumina based catalysts for methane dry reforming and CO2 methanation, Nouvelles voies de préparation de catalyseurs actifs et stables à base de Ni-alumine mésoporeuse pour le reformage à sec du méthane et la méthanation du CO2

Leila Karam

Dry reforming of methane (DRM) is a process that converts CH4 and CO2 gases into syngas, a gaseous mixture of H2 and CO. Ni based catalysts proved to be suitable for the reaction due to their good activity, wider availability and lower cost than noble-based materials. However, these catalysts are…, Le reformage à sec du méthane (DRM) est un processus qui convertit simultanément CH4 et CO2 en un mélange gazeux de H2 et de CO appelé syngas. Les catalyseurs à base de Ni sont particulièrement prometteurs mais ils ne sont pas stables en raison du frittage du Ni et du dépôt de coke. Dans cette…

Catalysis. Sorbonne Université; Université de Balamand (Tripoli, Liban), 2019. English. ⟨NNT : 2019SORUS163⟩. ⟨tel-03141292⟩

  • Article dans une revue

Nature of the active sites in CO oxidation on FeSiBEA zeolites

Ireneusz Kocemba, Jacek Rynkowski, Jacek Gurgul, Robert P. Socha, Kazimierz Łątka, Jean-Marc Krafft, Stanislaw Dzwigaj

FeSiBEA zeolites containing 1 wt% of iron were prepared by a two-step postsynthesis method in acidic (pH = 2.6) (Fe1.0SiBEA(w)) and alkaline (pH = 10) (Fe1.0SiBEA(p)) conditions. The structure of the studied materials, their acidity as well as the nature and environment of iron present in the…

Applied Catalysis A : General, 2016, 519, pp.16-26. ⟨10.1016/j.apcata.2016.03.025⟩. ⟨hal-01297494⟩

  • Article dans une revue

The impact of the hydrodechlorination process on the physicochemical properties of bimetallic Ag-CuBeta zeolite catalysts

A. Śrębowata, Izabela I. Kamińska, S. Casale, D. Brouri, C. Calers, Stanislaw Dzwigaj

Beta zeolites with two Si/Al ratios of 17 and 1300 were used for synthesis of Ag2.0Cu2.0HAlBeta and Ag2.0Cu2.0SiBeta zeolites by conventional wet impregnation and two-step postsynthesis methods, respectively. The calcination of Ag2.0Cu2.0HAlBeta and Ag2.0Cu2.0SiBeta at 773 K for 3 h in air led to…

Microporous and Mesoporous Materials, 2017, 243, pp.56-64. ⟨10.1016/j.micromeso.2016.12.022⟩. ⟨hal-01469231⟩

  • Article dans une revue

Production and Characterization of Activated Carbon from Orange Peels by Chemical Activation with Sulfuric Acid

Sami Guiza, Salwa Hajyahia, Franck Launay, Mohamed Bagane

Oranges represent 75% of the total citrus fruits (Guiza in Ecol Eng, 99: 134–140, 2017) throughout the world, and Tunisia is one of the major juice producers. Orange peels could cause a significant disposal problem but they are also valuable biomass wastes (Valdes et al. in Langmuir 18: 2111–2116,…

Recent advances in environmental science from the Euro Mediterranean and surrounding regions, 2018, Advances in Science, Technology & Innovation, pp.959-961. ⟨10.1007/978-3-319-70548-4_278⟩. ⟨hal-04020437⟩

  • Article dans une revue

Fe-clay-plate as a heterogeneous catalyst in photo-Fenton oxidation of phenol as probe molecule for water treatment

Haithem Bel Hadjltaief, Patrick da Costa, Patricia Beaunier, María Elena Gálvez, Mourad Ben Zina

A novel heterogeneous photo-Fenton plate catalyst was prepared by immobilizing iron species on the surface of natural Tunisian clay. The activity of this structured catalyst was assayed in the degradation of phenol under UV irradiation at two different wavelengths (245 nm, UVC, and 365 nm, UVA,…

Applied Clay Science, 2014, 91-92, pp.46-54. ⟨10.1016/j.clay.2014.01.020⟩. ⟨hal-01078296⟩