• Article dans une revue

Isopropanol Dehydration on Amorphous Silica–Alumina: Synergy of Brønsted and Lewis Acidities at Pseudo-Bridging Silanols

Kim Larmier, Céline Chizallet, Sylvie Maury, Nicolas Cadran, Johnny Abboud, Anne-Félicie Lamic-Humblot, Eric Marceau, Hélène Lauron-Pernot

The mechanism of isopropanol dehydration on amorphous silica–alumina (ASA) was unraveled by a combination of experimental kinetic measurements and periodic density functional theory (DFT) calculations. We show that pseudo-bridging silanols (PBS-Al) are the most likely active sites owing to the…

• Article dans une revue

Delamination of lamellar phyllosilicate Magadiite

Yun Fei Bi, Juliette Blanchard, Jean-Francois Lambert, Yannick Millot, P. P. Man, Shuang Qin Zeng, Hong Nie, da Dong Li, Ming Feng Li, Qing He Yang, Xiao Xin Chen

In this paper, a new delaminated mesoporous material was prepd. by swelling the lamellar phyllosilicate Magadiite using cetyltrimethylammonium bromide and tetrapropylammonium hydroxide soln., followed by delamination under the cavitation of ultrasonic treatment. Various characterization tools…

Chinese Science Bulletin, 2010, 55 (23), pp.2584-2588. ⟨10.1007/s11434-010-3737-8⟩. ⟨hal-00604701⟩

• Communication dans un congrès

Formation and fate of alpha-dicarbonyl compounds in honey and Maillard model systems

Varoujan A. Yaylayan, Eric Marceau, Fong L. Chu

Reactive alpha-dicarbonyl compds. can originate from various sources contg. reducing sugars. They are responsible for the formation of many important Maillard reaction products generated in food. Some alpha-dicarbonyl compds. are assocd. with toxicity and immunosuppressive effects while others with…

Abstracts of Papers, 239th ACS National Meeting, San Francisco, CA, United States, 2010, San Francisco, CA, United States, United States. pp.AGFD-95. ⟨hal-00604814⟩

• Article dans une revue

Peptide Interactions with Metal and Oxide Surfaces

Anne Vallee, Vincent Humblot, Claire-Marie Pradier

Increasing interest in bio-interfaces for medical, diagnostic, or biotechnology applications has highlighted the critical scientific challenge behind both the understanding and control of protein-solid surface interactions. In this context, this Account focuses on the molecular-level…

Accounts of Chemical Research, 2010, 43 (10), pp.1297-1306. ⟨10.1021/ar100017n⟩. ⟨hal-00604811⟩

• Article dans une revue

Different Kinds of Tetrahedral V Species in Vanadium-Containing Zeolites Evidenced by Diffuse Reflectance UV-vis, Raman, and Periodic Density Functional Theory

Anna E. Lewandowska, Miguel A. Banares, Frederik Tielens, Michel Che, Stanislaw Dzwigaj

The combined use of DR-UV-vis and Raman spectroscopies allows one to evidence three kinds of tetrahedral V-V with different structure in V(x)SiBEA zeolite. In all cases, vanadium species possess distorted tetrahedral configuration. At very low vanadium content (0.05 wt %), the majority of…

Journal of Physical Chemistry C, 2010, 114 (46), pp.19771-19776. ⟨10.1021/jp107589d⟩. ⟨hal-00604774⟩

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In Situ Generation of Active Pd Nanoparticles within a Macroreticular Acidic Resin: Efficient Catalyst for the Direct Synthesis of Hydrogen Peroxide

Kohsuke Mori, Akihiro Hanafusa, Michel Che, Hiromi Yamashita

An acidic resin bearing SO3H functional groups within its reticular structure acts as an efficient support for the in situ formation of highly active Pd nanoparticles (NPs) responsible for the direct synthesis of hydrogen peroxide from H2 and O2. Characterization by means of X-ray absorption fine…

Journal of Physical Chemistry Letters, 2010, 1 (10), pp.1675-1678. ⟨10.1021/jz100509x⟩. ⟨hal-00604783⟩

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Quantitative Investigation of MgO Bronsted Basicity: DFT, IR, and Calorimetry Study of Methanol Adsorption

Hugo Petitjean, Konstantin Tarasov, Francoise Delbecq, Philippe Sautet, Jean-Marc Krafft, Philippe Bazin, Maria Cristina Paganini, Elio Giamello, Michel Che, Helene Lauron-Pernot, Guylene Costentin

The adsorption geometries, energies, and vibrational frequencies of methanol on MgO defective surfaces have been calcd. by periodic DFT simulations. The results are very comparable with those obtained with water and are also in very good accordance with microcalorimetry and IR expts. At low…

Journal of Physical Chemistry C, 2010, 114 (7), pp.3008-3016. ⟨10.1021/jp909354p⟩. ⟨hal-00604791⟩

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Monitoring of the state of silver in porous oxides during catalyst preparation

Elie Sayah, Dalil Brouri, Anne Davidson, Pascale Massiani

Silver-supported porous oxides are promising heterogeneous catalysts for air treatment. Classical ways of prepn. are incipient wet impregnation or ion exchange (in case of zeolites) of a support with silver nitrate. Nevertheless, this precursor is known for its photosensitivity. The latter can lead…

Studies in Surface Science and Catalysis, 2010, 175 (Scientific Bases for the Preparation of Heterogeneous Catalysts), pp.711-714. ⟨hal-00604797⟩

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Chromium-Salophen as a Soluble or Silica-Supported Co-Catalyst for the Fixation of CO2 Onto Styrene Oxide at Low Temperatures

Matthieu Balas, Ludivine K/bidi, Franck Launay, Richard Villanneau

Addition of a soluble or a supported Cr III-salophen complex as a co-catalyst greatly enhances the catalytic activity of Bu 4 NBr for the formation of styrene carbonate from styrene epoxide and CO 2. Their combination with a very low co-catalyst:Bu 4 NBr:styrene oxide molar ratio 1:2:112 (…

Frontiers in Chemistry, 2021, 9 (765108), ⟨10.3389/fchem.2021.765108⟩. ⟨hal-03443129⟩

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Photocatalytic Easy Recovery of Orthophosphates Contaminants in Water Using Amberlite‐732 Cationic‐Resin Exchanged by Ce 3+ and Ce 3+ ‐Au 3+ Species

Phds. Nawel Rahmoune, Siham Barama, Anne Davidson, David Montero, Mohamed Selmane, Antoine Miche, Fouad Benaliouche, Akila Barama

This report discusses the efficiency of photo-recovery of orthophosphate anions in water under visible irradiation using materials containing amorphous carbon, ceria and gold-ceria species. Catalysts were obtained by the exchange of Amberlite-732 polymeric-resin with isolated Ce(III) and co-mixing…

ChemistrySelect, 2022, 7 (13), ⟨10.1002/slct.202104577⟩. ⟨hal-04030648⟩