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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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Van Santen, Rutger
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2011DFT studies of hydrogen storage properties of Mg0.75Ti0.25citations
- 2010Nanostructures of Mg0.65Ti0.35Dx studied with X-ray diffraction, neutron diffraction and magic-angle-spinning 2H NMR spectroscopycitations
- 2010Reactivity and selectivity of heterogenized homogeneous catalysts: insights from molecular simulationscitations
- 2009Nanorod calculations on body-centered cubic iron : a method for estimation of size-dependent surface energies of metal nanocrystalscitations
- 2008CO Dissociation on the Ru(1121) Surfacecitations
- 2007Enantioselectivity of immobilized Mn-salen complexes : a computational studycitations
- 2007An efficient hybrid, nanostructured, epoxidation catalyst: titanium silsesquioxane-polystyrene copolymer supported on SBA-15citations
- 2006Characterization and reactivity of Ga+ and GaO+ cations in zeolite ZSM-5citations
- 2003Characterization of Ga/HZSM-5 and Ga/HMOR synthesized by chemical vapor deposition of trimethylgalliumcitations
- 2002Synthesis and characterization of microporous Fe-Si-O materials with tailored iron content from silsesquioxane precursorscitations
- 2002PEG-mediated silica pore formation monitored in situ by USAXS and SAXS: Systems with properties resembling diatomaceous silicacitations
- 2002Synthesis and characterisation of microporous bimetallic Fe-Cr-Si-O materials derived from silsesquioxane precursorscitations
- 2001Microporous Mg-Si-O and Al-Si-O Materials Derived from Metal Silsesquioxanescitations
- 2001Synthesis, structural characterization, and transmetalation reactions of a tetranuclear magnesium silsesquioxane complexcitations
- 2001Intermediate species and reaction pathways for the oxidation of ammonia on powdered catalystscitations
- 2000Characterization of the microporosity of chromia- and titania-pillared montmorillonites differing in pillar density. I. Adsorption of nitrogencitations
Places of action
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article
Characterization of Ga/HZSM-5 and Ga/HMOR synthesized by chemical vapor deposition of trimethylgallium
Abstract
Chemical vapor deposition (CVD) of trimethylgallium (TMG) has been studied as a method to disperse extraframework Ga in acidic ZSM-5 and mordenite zeolite. Various samples were extensively characterized by ICP, XPS, NMR, and FTIR. Silylation with tetramethyldisilazane is explored as a method for deactivating the external zeolite surface. The deposition of TMG in silylated ZSM-5 results in a gallium-to-aluminum ratio close to unity, which indicates a homogeneous metal distribution in the micropore space. However, pore blockage in the one-dimensional channels of mordenite results in a inhomogeneous distribution and a low Ga loading. Upon exposure to moistened air, the adsorbed methylgallium species decompose and alkoxy groups are formed. Subsequent oxidation or reduction leads to the complete removal of methyl groups. The reductive route is the preferred one resulting in a better dispersion of Ga, since oxidation of the methyl groups leads to water formation and hydrolysis of cationic Ga species.