| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Lamberti, Carlo
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2018Experimental and theoretical study of hydrogen desorption process from Mn(BH4)2citations
- 2018Time-resolved operando studies of carbon supported Pd nanoparticles under hydrogenation reactions by X-ray diffraction and absorptioncitations
- 2017Effect of Molecular Guest Binding on the d-d Transitions of Ni(2+) of CPO-27-Ni: A Combined UV-Vis, Resonant-Valence-to-Core X-ray Emission Spectroscopy, and Theoretical Studycitations
- 2017Modulator Effect in UiO-66-NDC (1,4-Naphthalenedicarboxylic Acid) Synthesis and Comparison with UiO-67-NDC Isoreticular Metal–Organic Frameworkscitations
- 2017Effect of Benzoic Acid as a Modulator in the Structure of UiO-66: An Experimental and Computational Studycitations
- 2017Core-Shell Structure of Palladium Hydride Nanoparticles Revealed by Combined X-ray Absorption Spectroscopy and X-ray Diffractioncitations
- 2017CO2 Hydrogenation over Pt-Containing UiO-67 Zr-MOFs—The Base Casecitations
- 2017State-of-the-Art X-Ray Spectroscopy in Catalysiscitations
- 2015XAS and XES techniques shed light on the dark side of Ziegler-Natta catalysts: Active-site generationcitations
- 2015XAS and XES Techniques Shed Light on the Dark Side of Ziegler–Natta Catalysts: Active‐Site Generationcitations
- 2013EXAFS and XANES investigation of (Li, Ni) codoped ZnO thin films grown by pulsed laser depositioncitations
- 2011Combined study of structural properties of metal-organic frameworks changing organic linkers and metal centers
- 20110.5 wt.% Pd/C catalyst for purification of terephthalic acid: Irreversible deactivation in industrial plantscitations
- 2011Structure-activity relationships of simple molecules adsorbed on MOF materials: in situ experiments vs. theory
- 2010X-ray absorption spectroscopies: useful tools to understand Metallorganic frameworks structure and reactivitycitations
- 2009Influence of K-doping on a Pd/SiO2–Al2O3 catalystcitations
- 2009CO adsorption on CPO-27-Ni coordination polymer: spectroscopic features and interaction energycitations
- 2009CO adsorption on cpo-27-ni coordination polymercitations
- 2009Determination of the particle size, available surface area and nature of exposed sites for silica-alumina supported Pd nanoparticles: a multitechnical approachcitations
- 2008Oriented TiO2 nanostructured pillar arrays: Synthesis and characterizationcitations
- 2008Oriented TiO2 nanostructured pillar arrayscitations
- 2008Local structure of CPO-27-Ni metallorganic framework upon dehydration and coordination of NOcitations
- 2005New strategies in the Raman study of the Cr/SiO2 Phillips catalyst: Observation of molecular adducts on Cr(II) sitescitations
- 2005FTIR investigation of the H-2, N-2, and C2H4 molecular complexes formed on the Cr(II) sites in the Phillips catalyst: A preliminary step in the understanding of a complex systemcitations
- 2004Carbon monoxide MgO from dispersed solids to single crystals: a review and new advancescitations
- 2004X-ray absorption study at the Mg and O K-edges of ultrathin MgO epilayers on Ag(001)citations
- 2004Nio and Mgo ultrathin films by polarization dependent xascitations
- 2003X-ray Standing Waves studies of strained InxGa1-xAs/InP short period superlatticescitations
- 2003The use of EXAFS spectroscopy related techniques in the characterization of III-V thin films heterostructures
Places of action
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article
XAS and XES Techniques Shed Light on the Dark Side of Ziegler–Natta Catalysts: Active‐Site Generation
Abstract
<jats:title>Abstract</jats:title><jats:p>The local structure and the electronic properties of the active Ti sites in heterogeneous Ziegler–Natta catalysts, generated in situ by interaction of the precatalyst with different Al‐alkyl activators, were investigated by combining X‐ray absorption and valence‐to‐core X‐ray emission spectroscopy (XAS and vtc‐XES), coupled with UV/Vis, FTIR, and DFT theoretical calculations. Irrespective of the activator used, the active system was found to be a highly dispersed TiCl<jats:sub>3</jats:sub>‐like phase in which the Ti sites are surrounded, not only by bridged chlorine ligands (with the same bond length of bulk TiCl<jats:sub>3</jats:sub>), but also by terminal chlorine ligands, at a much shorter distance. These results set Ziegler–Natta catalysts in the category of complex nanomaterials. Despite the observation that the investigated catalysts polymerize ethylene, cutting‐edge XAS and XES techniques do not yet offer unequivocal proof for the presence of any alkyl chain attached to the Ti sites, as a consequence of the small fraction of the active sites.</jats:p>