• Article dans une revue

Identification of a Ubiquinone-Ubiquinol Quinhydrone Complex in Bacterial Photosynthetic Membranes and Isolated Reaction Centers by Time-Resolved Infrared Spectroscopy

Alberto Mezzetti, Jean-Francois Paul, Winfried Leibl

Ubiquinone redox chemistry is of fundamental importance in biochemistry, notably in bioenergetics. The bi-electronic reduction of ubiquinone to ubiquinol has been widely studied, including by Fourier transform infrared (FTIR) difference spectroscopy, in several systems. In this paper, we have…

International Journal of Molecular Sciences, 2023, International Journal of Molecular Sciences, 24 (6), pp.5233. ⟨10.3390/ijms24065233⟩. ⟨hal-04133205⟩

• Article dans une revue

Characterisation and Reactivity of Oxygen Species at the Surface of Metal Oxides

M. Anpo, Guylène Costentin, E. Giamello, H. Lauron-Pernot, Z. Sojka

Surface reactive oxygen species play a fundamental role in selective oxidation and combustion reactions catalyzed by metal oxides. Unravelling the nature of these transient species, and understanding the details of both their electronic structure and reactivity has been for decades one of the prime…

Journal of Catalysis, 2021, 393, pp.259-280. ⟨10.1016/j.jcat.2020.10.011⟩. ⟨hal-03223789⟩

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Cobalt-containing BEA zeolite for catalytic combustion of toluene

Anna Rokicińska, Marek Drozdek, Barbara Dudek, Barbara Gil, Piotr Michorczyk, Dalil Brouri, Stanislaw Dzwigaj, Piotr Kuśtrowski

Co-containing HAlBEA zeolite was obtained by conventional wet impregnation of HAlBEA zeolite with an aqueous Co(NO3)2.6 H2O solution, whereas Co-containing SiBEA zeolites were prepared by a two-step post-synthesis method. This approach consists of, in the first step, dealumination of parent BEA…

Applied Catalysis B: Environmental, 2017, 212, pp.59 - 67. ⟨10.1016/j.apcatb.2017.04.067⟩. ⟨hal-01517429⟩

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Experimental evidence of NO SCR mechanism in the presence of the BEA zeolite with framework and extra-framework cobalt species

Paweł Boroń, Lucjan Chmielarz, Barbara Gil, Bartosz Marszałek, Stanislaw Dzwigaj

Temperature-programmed desorption (TPD), temperature-programmed surface reaction (TPSR) and stop flow-TPD techniques as well as FT-IR spectroscopy of pre-adsorbed NH3 and NO are applied to characterize active sites present in Co-containing BEA zeolites. Cobalt is introduced into BEA zeolite by…

Applied Catalysis B: Environmental, 2016, 198, pp.457-470. ⟨10.1016/j.apcatb.2016.06.012⟩. ⟨hal-01329568⟩

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Heterostructured Cobalt Silicide Nanocrystals: Synthesis in Molten Salts, Ferromagnetism, and Electrocatalysis

Yang Song, Isabel Gómez-Recio, Anissa Ghoridi, Fernando Igoa Saldaña, Daniel Janisch, Capucine Sassoye, Vincent Dupuis, David Hrabovsky, M. Luisa Ruiz-González, José González-Calbet, Sandra Casale, Andrea Zitolo, Benedikt Lassalle-Kaiser, Christel Laberty-Robert, David Portehault

Nanoscale heterostructures of covalent intermetallics should give birth to a wide range of interface-driven physical and chemical properties. Such a level of design however remains unattainable for most of these compounds, due to the difficulty to reach a crystalline order of covalent bonds at the…

Journal of the American Chemical Society, 2023, 145 (35), pp.19207-19217. ⟨10.1021/jacs.3c01110⟩. ⟨hal-04199618⟩

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Metal–Support Interactions in Pt-WO 3 Heterostructures: Role of WO 3 Polymorphism

Isabel Gómez-Recio, Cyril Thomas, Christophe Méthivier, María Luisa Ruiz-González, José González-Calbet, David Portehault

Ionic exchange under soft conditions yields nanoplatelets of tungsten bronzes with an original crystal structure doped with cobalt, copper, platinum, and cesium cations (h′-MxWO3). The optimal orientation of the tunnel-based crystal structure, perpendicular to the basal plane of the nanoplatelets,…

Chemistry of Materials, 2023, 35 (19), pp.7931-7942. ⟨10.1021/acs.chemmater.3c01128⟩. ⟨hal-04752694⟩

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Direct grafting of ethylene sulfide onto silicic acid magadiite

Michelle Menezes de Oliveira, Marcia Maria Fernandes, Maria Gardennia Fonseca, Edson Cavalcanti da Silva Filho, Antonio Gouveia de Souza, Fabrice Gaslain, Maguy Jaber

Acidic magadiite (HMag) was directly reacted with ethylene sulfide (ES) under various controlled conditions producing an intercalated hybrid silicate (MagS). The sodium, acidic and modified magadiites were characterized using elemental analysis, thermogravimetric analysis (TGA/DTG), infrared…

Microporous and Mesoporous Materials, 2014, 196, pp.292-299. ⟨10.1016/j.micromeso.2014.05.010⟩. ⟨hal-01018650⟩

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The role of the synthesis method in the structure formation of cobalt aluminate

Thomas Onfroy, Wen-Cui Li, Ferdi Schueth, Helmut Knoezinger

Cobalt aluminate (spinel) was prepd. via two synthesis routes firstly a co-pptn. method and secondly a nanocasting method. The surface chem. of these materials was characterized by IR-spectroscopy of the surface hydroxyl groups and of coordinatively unsatd. (cus) cations (Al and Co) by carbon…

Topics in Catalysis, 2011, 54 (5-7), pp.390-397. ⟨10.1007/s11244-011-9669-y⟩. ⟨hal-00602945⟩

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Conducting polymer nanostructures for photocatalysis under visible

Srabanti Ghosh, Natalie Amoin Kouame, Laurence Ramos, Samy Remita, Alexandre Dazzi, Ariane Deniset-Besseau, Patricia Beaunier, Fabrice Goubard, Pierre-Henri Aubert, Hynd Remita

Nature Materials, 2015, pp.505-511. ⟨10.1038/nmat4220⟩. ⟨hal-02979988⟩

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Atomic Scale Observation of the Structural Dynamics of Supported Gold Nanocatalysts under 1,3‐Butadiene by in situ Environmental Transmission Electron Microscopy

Abdallah Nassereddine, Laurent Delannoy, Christian Ricolleau, Catherine Louis, Alloyeau D., Guillaume Wang, Qing Wang, Hazar Guesmi, Jaysen Nelayah

Supported gold catalysts have been reported to exhibit exceptional selectivity towards the desirable product, an alkene, in chemoselective hydrogenation of highly unsaturated alkynes and alkadienes. However, insights on the interactions between the gold nanoparticles and the 1,3‐butadiene…

ChemCatChem, 2023, 15 (15), pp.e202300434. ⟨10.1002/cctc.202300434⟩. ⟨hal-04210993⟩