Laboratoire de réactivité de surface

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  • Article dans une revue

The Acidity of Zeolites: Concepts, Measurements and Relation to Catalysis: A Review on Experimental and Theoretical Methods for the Study of Zeolite Acidity

E.G. Derouane, Jacques C. Vedrine, Ramos R. Pinto, P.M. Borges, L. Costa, M. A. N. D. A. Lemos, F. Lemos, Ramôa Ribeiro

In this article, we considered all aspects of acidity (nature of acid sites, strength, density, etc.) in solid catalysts and in zeolites in particular. After reminding the definition of acidity in liquid and solid acids, we emphasized acidity characterization by the most used physical techniques,…

Catalysis Reviews: Science and Engineering, 2013, 4, pp.454-515(62). ⟨10.1080/01614940.2013.822266⟩. ⟨hal-00914604⟩

  • Article dans une revue

Reactivity of gas-phase, crystal and supported V2O5 systems studied using density functional theory based reactivity indices

M. Calatayud, Frederik Tielens, F. de Proft

The existence of stable V2O5 compounds as gas-phase cluster, single crystal or as supported catalyst has motivated the present work aiming at characterizing the chemical reactivity of the different aggregated moieties. We apply the concepts of electrostatic potential and Fukui function, based on…

Chemical Physics Letters, 2008, 456 (1-3), pp.59-63. ⟨10.1016/j.cplett.2008.03.007⟩. ⟨hal-01361372⟩

  • Article dans une revue

Low-energy electron induced resonant loss of aromaticity: consequences on cross-linking in terphenylthiol SAMs

L. Amiaud, J. Houplin, M. Bourdier, V. Humblot, R. Azria, C.-M. Pradier, A. Lafosse

Aromatic self-assembled monolayers (SAMs) can be used as negative tone electron resists in functional surface lithographic fabrication. A dense and resistant molecular network is obtained under electron irradiation through the formation of a cross-linked network. The elementary processes and…

ChemPhysChem, 2014, 16 (3), pp.1050-9. ⟨10.1039/c3cp53023j⟩. ⟨hal-01121193⟩

  • Article dans une revue

Ionic liquid redox flow membraneless battery in microfluidic system

Nesrine Chaabene, Kieu Ngo, Mireille Turmine, Vincent Vivier

Redox flow batteries (RFBs) often require the presence of a physical membrane to separate the two compartments of the battery. The objective of this work is to develop a membraneless microfluidic redox flow battery (RFB) by using 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (…

Journal of Energy Storage, 2023, 57, pp.106270. ⟨10.1016/j.est.2022.106270⟩. ⟨hal-03920525⟩

  • Article dans une revue

What do vanadium framework sites look like in redox model silicate zeolites?

Frederik Tielens, Monica Calatayud, Stanislaw Dzwigaj, Michel Che

Ab initio periodic DFT Calculations on the structural and energy properties of different model vanadium framework sites in vanadium-substituted zeolites containing sodalite cavities are presented and related to experimental FTIR measurements on V containing SiBEA zeolite. The vanadium framework…

Microporous and Mesoporous Materials, 2009, 119 (1-3), pp.137-143. ⟨10.1016/j.micromeso.2008.10.007⟩. ⟨hal-01361361⟩

  • Article dans une revue

Nature of vanadium species in V substituted zeolites: A combined experimental and theoretical study

M. Trejda, M. Ziolek, S. Dzwigaj, Frederik Tielens

The nature of vanadium species in V substituted zeolites is determined by combined experimental (XRD, FTIR, DR UV-vis) and theoretical (periodic DFT Calculations) Study. The introduction of V ions in lattice sites of SiBEA zeolite is evidenced by XRD and FTIR spectroscopy. The state of vanadium is…

Catalysis Today, 2008, 139 (3), pp.221-226. ⟨10.1016/j.cattod.2008.04.007⟩. ⟨hal-01361370⟩

  • Article dans une revue

Exploring the reactivity of intraframework vanadium, niobium and tantalum sites in zeolitic materials using the molecular electrostatic potential

Frederik Tielens

The acid-base properties of group 5 zeolitic structures are discussed using the molecular electrostatic potential. The results point out that vanadium doped zeolites are less appropriate for electrophilic reactions, yielding minor basic character when they are compared with Nb or Ta doped zeolites…

Journal of Molecular Structure: THEOCHEM, 2009, 903 (1-3, SI), pp.23-27. ⟨10.1016/j.theochem.2008.09.045⟩. ⟨hal-01361358⟩

  • Article dans une revue

Speciation of Ruthenium as a Reduction Promoter of Silica-Supported Co Catalysts: A Time-Resolved in Situ XAS Investigation

Jingping Hong, Eric Marceau, Andrei Y. Khodakov, Lucia Gaberová, Anne Griboval-Constant, Jean-Sébastien Girardon, Camille La Fontaine, Valérie Briois

Complete reduction of the metal phase in cobalt-containing catalysts is often difficult to reach and can be promoted by a small amount of noble metals. Because these costly promoters are introduced in a very low quantity, their speciation and their chemical interaction with cobalt have seldom been…

ACS Catalysis, 2015, 5 (2), pp.1273-1282. ⟨10.1021/cs501799p⟩. ⟨hal-01120477⟩

  • Ouvrages

Characterization of Solid Materials and Heterogeneous Catalysts: From Structure to Surface Reactivity, Volume 1&2

Che Michel, Védrine Jacques C.

This two-volume book provides an overview of physical techniques used to characterize the structure of solid materials, on the one hand, and to investigate the reactivity of their surface, on the other. Therefore this book is a must-have for anyone working in fields related to surface reactivity.…

2012, ⟨10.1002/9783527645329⟩. ⟨hal-01121673⟩

  • Article dans une revue

Conversion of xylene over mordenites: an operando infrared spectroscopy study of the effect of Na+

Pascale Massiani, Olivier Marie, Frédéric Thibault-Starzyk

A series of progressively proton-exchanged sodium mordenite samples was studied by operando infrared spectroscopy during xylene conversion. This unique, powerful tool allowed us to characterize the species adsorbed to the surface during catalysis and to follow the evolution of the active sites as…

Journal of Catalysis, 2004, 230, pp.28-37. ⟨hal-00126974⟩