• Article dans une revue

The structural and the photoelectrochemical properties of ZnO–ZnS/ITO 1D hetero-junctions prepared by tandem electrodeposition and surface sulfidation: on the material processing limits

A. Brayek, S. Chaguetmi, M. Ghoul, I. Ben Assaker, R. Chtourou, P. Decorse, P. Beaunier, S. Nowak, F. Mammeri, S. Ammar

ZnO–ZnS 1D hetero-nanostructures were prepared by an easy and scalable processing route. It consists of ZnO nanorod electrodeposition on ITO substrate and surface sulfidation by ion exchange in an aqueous Na 2 S solution. Increasing the treatment contact time (t c) from 8 to 48 h involves different…

RSC Advances, 2018, 8 (21), pp.11785 - 11798. ⟨10.1039/c8ra00176f⟩. ⟨hal-01748875⟩

• Article dans une revue

Mesocellular silica foam-based Ni catalysts for dry reforming of CH4 (by CO2)

Oscar Daoura, Marie-Nour Kaydouh, Nissrine El-Hassan, Pascale Massiani, Franck Launay, Maya Boutros

Nickel-containing mesocellular silica foam (MCF) catalysts were prepared for dry reforming of methane (DRM). Different methods were used for the synthesis of the MCFs supports in order to enhance their surface areas and pore volumes. The incorporation of nickel was done by three different methods:…

Journal of CO2 Utilization, 2018, 24, pp.112-119. ⟨10.1016/j.jcou.2017.12.010⟩. ⟨hal-02414803⟩

• Article dans une revue

Study of gold electrodissolution by scanning electrochemical microscopy in different modes

Divino Salvador Ramírez-Rico, Michel Keddam, Erika Roxana Larios-Durán, Vincent Vivier

The electrodissolution of gold has already been widely studied by several methods, but no consensus concerning the reaction mechanism has been reached. In this work, the scanning electrochemical microscopy (SECM) has been used in transient condition for studying the electrodissolution of gold in…

Electrochimica Acta, 2024, 481, pp.143956. ⟨10.1016/j.electacta.2024.143956⟩. ⟨hal-04468714⟩

• Article dans une revue

Efficiency of Polyoxometalate-Based Mesoporous Hybrids as Covalently Anchored Catalysts

Faiza Bentaleb, Ourania Makrygenni, Dalil Brouri, Cristina Coelho Diogo, Ahmad Mehdi, Anna Proust, Franck Launay, Richard Villanneau

Polyoxometalate (POM) hybrids have been covalently immobilized through the formation of amide bonds on several types of mesoporous silica. This work allows the comparison of three POM-based mesoporous systems, obtained with three different silica supports in which either the organic functions of…

Inorganic Chemistry, 2015, 54 (15), pp.7607-7616. ⟨10.1021/acs.inorgchem.5b01216⟩. ⟨hal-02143856⟩

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Revealing Size Dependent Structural Transitions in Supported Gold Nanoparticles in Hydrogen at Atmospheric Pressure

Abdallah Nassereddine, Qing Wang, David Loffreda, Christian Ricolleau, Damien Alloyeau, Catherine Louis, Laurent Delannoy, Jaysen Nelayah, Hazar Guesmi

The enhancement of the catalytic activity of gold nanoparticles with their decreasing size is often attributed to the increasing proportion of low-coordinated surface sites. This correlation is based on the paradigmatic picture of working gold nanoparticles as perfect crystal forms having complete…

Small, 2021, pp.2104571. ⟨10.1002/smll.202104571⟩. ⟨hal-03367920⟩

• Article dans une revue

Catalytic behavior of nickel loaded on acid-activated and pillared clay in total gas-phase oxidation of ethanol

Nadjat Lahoues-Chakour, Siham Barama, Akila Barama, Brahim Djellouli, Cyril Domingos, Anne Davidson

Layered and acid-activated clays, used as catalytic support, were synthesized from natural Algerian montmorillonite. All supports were prepared by (1) pillaring with aquo/hydroxo/oxo Al clusters, in particular Al13 that contains only octahedral Al-species, (2) an acidic H2SO4 treatment, and (3)…

Journal of Nanoparticle Research, 2018, 20 (11), pp.294. ⟨10.1007/s11051-018-4385-1⟩. ⟨hal-02022621⟩

• Communication dans un congrès

Structural and electrochemical properties of Y(Ni,Mn)3 compounds in protic ionic liquid

J Monnier, G Fedlouk, J Chan, E Kurchavova, M Turmine, V Vivier, L. Laversenne, M Mateos, F Cuevas, J Zhang

The achievable voltage of an alkaline battery is limited by the narrow electrochemical stability window of water and its service life is constrained by corrosion issues related to highly concentrated alkaline solutions. An alternative to aqueous media is the use of ionic liquid (IL)-based…

MH2024, May 2024, Saint-Malo, France. ⟨hal-04959488⟩

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Ni-Silica-based Catalysts for CH4 Reforming by CO2 with Enhanced Stability: Recent Designs and the Impacts of Ni Confinement, Promoters, and Core-Shell Structures

Oscar Daoura, Maya Boutros, Franck Launay

CO2 reforming of CH4, also referred to as the Dry Reforming of Methane (DRM), is considered an excellent method to produce H2 and CO (syngas), which are known to be used for the production of higher alkanes and oxygenates. Despite nickel’s moderate toxicity, Ni-based heterogeneous catalysts are…

Journal of Energy and Power Technology, 2021, 3 (1), ⟨10.21926/jept.2101007⟩. ⟨hal-04025299⟩

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Influence of the state of iron on CO oxidation on FeSiBEA zeolite catalysts

Izabela Hnat, Ireneusz Kocemba, Jacek Rynkowski, Thomas Onfroy, Stanislaw Dzwigaj

The influence of the state of iron on the catalytic properties of FexSiBEA zeolite in the oxidation of CO was investigated. Various FexSiBEA zeolites (x = 0.6, 1.0, 4.0 and 10 wt%) were prepared by a two-step post synthesis method. The presence of Fe(III) in tetrahedral coordination for low Fe…

Catalysis Today, 2011, 176, pp.229-233. ⟨10.1016/j.cattod.2010.12.052⟩. ⟨hal-00664469⟩

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Transforming a Diamagnetic Ordered Mesoporous Silica Monolith into a Room Temperature Permanent Magnet through Multiscale Control of the Magnetic Properties

Virgile Trannoy, Laura Altenschmidt, Giulia Fornasieri, Amélie Bordage, Eric Rivière, Patricia Beaunier, Anne Bleuzen

ChemNanoMat, 2018, 4 (12), pp.1254-1261. ⟨10.1002/cnma.201800333⟩. ⟨hal-02353510⟩