• Article dans une revue

Palladium Nanowires Synthesized in Hexagonal Mesophases: Application in Ethanol Electrooxidation

Faygal Ksar, Geetarani Surendran, Laurence Ramos, Bineta Keita, Louis Nadjo, Eric Prouzet, Patricia Beaunier, Agnes Hagege, Fabrice Audonnet, Hynd Remita

Palladium nanowires (of length a few tens of nanometers) are synthesized in a hexagonal mesophase formed by a quaternary system (Pd-doped water, surfactant, cosurfactant, and oil) by electron beam irradiation. The mesophases can be doped by high concentrations of palladium (0.1 M) without any…

Chemistry of Materials, 2009, 21, pp.1612-1617. ⟨10.1021/cm803492j⟩. ⟨hal-00514226⟩

• Article dans une revue

High activity of mononuclear copper present in the framework of CuSiBEA zeolites in the selective catalytic reduction of NO with NH3

Rafal Baran, Teresa Grzybek, Thomas Onfroy, Stanislaw Dzwigaj

CuxSiBEA zeolites (with x = 1–7.5 Cu wt %) prepared by a two-step postsynthesis method which consists in the first step of dealumination of parent BEA zeolite to obtain aluminum-free SiBEA support and then in the second step, of contacting the obtained material with an aqueous solution of copper…

Microporous and Mesoporous Materials, 2016, 226, pp.104-109. ⟨10.1016/j.micromeso.2015.11.065⟩. ⟨hal-01263831⟩

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Influence of natural adsorbates of magnesium oxide on its reactivity in basic catalysis

Damien Cornu, Hugo Petitjean, Guylène Costentin, Hazar Guesmi, Jean-Marc Krafft, Hélène Lauron-Pernot

Solid materials possessing basic properties are naturally covered by carbonates and hydroxyl groups. Those natural adsorbates modify their chemical reactivity. This article aims to specifically evidence the role of surface carbonates and hydroxyls in basic heterogeneous catalysis on MgO. It…

Physical Chemistry Chemical Physics, 2013, 15 (45), pp.19870-19878. ⟨10.1039/C3CP53624F⟩. ⟨hal-00911519⟩

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In situ observation of atomic redistribution in alloying gold-silver nanorods

Jessi E S van Der Hoeven, Tom a J Welling, Tiago a G da Silva, Jeroen E van den Reijen, Camille La Fontaine, Xavier Carrier, Catherine Louis, Alfons van Blaaderen, Petra E de Jongh

The catalytic performance and optical properties of bimetallic nanoparticles critically depend on the atomic distribution of the two metals in the nanoparticles. However, at elevated temperatures, during light induced heating or during catalysis atomic redistribution can occur. Measuring such metal…

ACS Nano, 2018, 12 (8), pp.8467-8476. ⟨10.1021/acsnano.8b03978⟩. ⟨hal-03157963⟩

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Improved Experimental Setup to Reach a Broad Frequency Domain in Local Electrochemical Impedance Spectroscopy Measurements

Maurilio Pereira Gomes, Samantha Michelle Gateman, Isolda Costa, Oumaïma Gharbi, Kieu Ngo, Jesualdo Luiz Rossi, Mireille Turmine, Vincent Vivier

We report a new experimental setup enabling local electrochemical impedance spectroscopy (LEIS) measurements over a wide frequency range, including the low frequency domain. First, an improved signal treatment was performed using a potential shifter to minimize the DC component of the measured…

Measurement - Journal of the International Measurement Confederation (IMEKO), 2022, 200, pp.111504. ⟨10.1016/j.measurement.2022.111504⟩. ⟨hal-03719357⟩

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Amine degradation in CO₂ capture. 3. New degradation products of MEA in liquid phase: Amides and nitrogenous heterocycles

C. Gouedard, A. Rey, V. Cuzuel, J. Brunet, B. Delfort, D. Picq, J. Dugay, J. Vial, Valérie Pichon, Franck Launay, L. Assam, J. Ponthus, P. -L. Carrette

To reduce greenhouse gas emissions from fossil fuel power plants, post combustion CO2 capture with amine-based solvent is the most mature technology. Ethanolamine (MEA), the benchmark amine, is the most studied amine but some degradation products are still unknown and for an environmental…

• Communication dans un congrès

Green NH3 Synthesis via HydroxyApatite-Supported Ru Catalysts for Sustainable H2 Storage under mild conditions

Sabrina Akrour, Alexandre Vimont, Guylène Costentin, Cyril Thomas

13th International Conference on Environmental Catalysis (ICEC), Jun 2025, Isola delle Femmine, Italy. ⟨hal-05657944⟩

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Decoding anionic organization of hydroxide-fluorides in a diaspore-type network

Helies Hyrondelle, Matthew Suchomel, Vincent Rodriguez, Étienne Durand, Yannick Millot, Mathieu Duttine, Alain Demourgues

The diaspore-type crystalline structure is historically well-known in mineralogy, but it has also been widely studied for various applications in the field of catalysis, electrocatalysis, and batteries. However, once two anions of similar ionic size but different electronegativity, such as F– and…

Inorganic Chemistry, 2025, 64 (4), pp.1677-1689. ⟨10.1021/acs.inorgchem.4c03794⟩. ⟨hal-04939898⟩

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Gold/Polyoxometalate Core/Shell Nanoparticles for Combined Chemotherapy–Photothermal Cancer Therapy

Somia Tomane, Claire Wilhelm, Souhir Boujday, Alexandre Fromain, Antoine Miche, Flavien Bourdreux, Anne Dolbecq, Pierre Mialane, Anne Vallée

We designed monodisperse and perfectly shaped core/shell AuNP@Mo4Zol2Mn nanohybrids consisting of gold nanoparticles (AuNPs) functionalized by an antitumoral polyoxometalate (POM) incorporating the biologically active zoledronate ligand. After incubation, the nanoparticles were readily confined in…

ACS Applied Nano Materials, 2021, 4 (3), pp.2339-2344. ⟨10.1021/acsanm.0c03187⟩. ⟨hal-03214106⟩

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Selective uptake of alkaline earth metals by cyanobacteria forming intracellular carbonates

Nithavong Cam, Karim Benzerara, Thomas Georgelin, Maguy Jaber, Jean-Francois Lambert, Melanie Poinsot, Feriel Skouri-Panet, Laure Cordier

The uptakes of Ca, Sr and Ba by two cyanobacterial strains, Cyanothece sp. PCC7425 and Gloeomargarita lithophora, both forming intracellular carbonates, were investigated in laboratory cultures. In the culture medium BG 11 amended with 250 μM of Ca and 50 or 250 μM of Sr and Ba, G. lithophora…

Environmental Science and Technology, 2016, 50 (21), pp.11654-11662. ⟨10.1021/acs.est.6b02872⟩. ⟨hal-01383264⟩