A5007752829- Zeolite Catalysis and Synthesis
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Catalysis and Hydrodesulfurization Studies
- Mesoporous Materials and Catalysis
- Catalysis for Biomass Conversion
- Catalysts for Methane Reforming
- Ammonia Synthesis and Nitrogen Reduction
- Chemical Synthesis and Characterization
- Nanomaterials for catalytic reactions
- Thermodynamic properties of mixtures
- Layered Double Hydroxides Synthesis and Applications
- Carbon Dioxide Capture Technologies
- Chemical and Physical Properties in Aqueous Solutions
- Biodiesel Production and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Molecular Junctions and Nanostructures
- Industrial Gas Emission Control
- Chemical Synthesis and Reactions
- Supercapacitor Materials and Fabrication
- Iron and Steelmaking Processes
- Carbon dioxide utilization in catalysis
- Phase Equilibria and Thermodynamics
- Inorganic and Organometallic Chemistry
- Analytical Chemistry and Chromatography
University of Cagliari
2000-2020
Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari
2002-2019
University of Milan
1990
Abstract Nanosized NiO, CeO 2 and NiO-CeO mixed oxides with different Ni/Ce molar ratios were prepared by the soft template method. All samples characterized techniques as to their chemical composition, structure, morphology texture. On catalysts submitted same reduction pretreatment adopted for activity tests surface basic properties specific metal area also determined. NiO nanocrystals of about 4 nm in size obtained, regardless ratio. The Raman X-ray photoelectron spectroscopy results...
Supported nickel catalysts were synthesized, characterized, and employed in the carbon oxides co-methanation process. Five NiO/CeO2-ZrO2 mixed oxides, with same Ni content different Ce/Zr molar ratios, prepared by soft-template method. They characterized through ICP-AES, N2 adsorption, XRD, TPR. Reduced Ni/CeO2-ZrO2 obtained submitting oxide systems to reduction treatment H2 at 400 °C. H2-TPD, CO2 adsorption microcalorimetry their catalytic performances investigated. Catalytic tests...
The CeO2–La2O3 catalytic system was prepared by a sol–gel technique from inorganic precursors in the presence or absence of H2O2 . Samples were characterised means nitrogen physisorption, TG-DTA, XRD, IR, XPS and TEM. Preparation ia produces certain interesting modifications CeO2–La2O3, both structurally morphologically. Higher surface areas have been found for H2O2. On other hand, La2O3 structure obtained upon calcination at 873 K corresponds to La(OH)3, with hydrogen peroxide, mixture...
SBA-15 functionalization with mercaptopropyltrimethoxysilane has been used to prepare supported gold catalysts for the low temperature CO oxidation reaction. Supports and have characterized by chemical analysis, CHS XRD, TGA, nitrogen adsorption-desorption at 77 K, TEM, CPMAS NMR, XPS EPR. Catalytic runs carried out atmospheric pressure 313-623 K influence of diverse thermal treatments samples prior reaction investigated. The presence organic residues size nanoparticles strongly affect...
Zirconia samples have been prepared from xerogels and aerogels obtained using zirconium n-propoxide as precursor. Structure texture investigated by X-ray diffraction, thermal analysis, transmission electron microscopy, nitrogen adsorption/desorption. Surface acidity basicity assessed adsorption microcalorimetry, ammonia carbon dioxide probe molecules. 4-Methylpentan-2-ol dehydration has tested at atmospheric pressure in a fixed-bed flow microreactor. The xerogel gives tetragonal zirconia...
The acidity of H-MCM-22 zeolite has been investigated by ammonia adsorption microcalorimetry and IR spectroscopy adsorbed nitriles (isobutyronitrile pivalonitrile) aromatics (p-, o-, m-xylene). most abundant "zeolitic" OHs are exposed in the supercage system, absorbing predominantly at ca. 3618−3625 cm−1. Less those sinusoidal channel range 3600−3618 A third OH family, responsible for a weak band 3575 cm−1, is also observed. hindered probe pivalonitrile strongly supports conclusion that...
Lanthanum and cerium oxides have been tested for the title reaction at 623 K atmospheric pressure in a flow reactor. oxide (prepared from corresponding nitrate) gives mainly 4-methylpent-1-ene (80% of products). Similar results are observed with obtained hydroxide, whereas prepared nitrate is less selective towards alk-1-enes. In addition to dehydration, dehydrogenation 4-methylpentan-2-one also limited extent all catalysts. Information on acid–base properties samples was by adsorption...