A5025407730- Catalytic Processes in Materials Science
- Mesoporous Materials and Catalysis
- Zeolite Catalysis and Synthesis
- Aerogels and thermal insulation
- Supercapacitor Materials and Fabrication
- Phosphorus and nutrient management
- NMR spectroscopy and applications
- Catalysis and Oxidation Reactions
- Transition Metal Oxide Nanomaterials
- Advanced NMR Techniques and Applications
- Iron oxide chemistry and applications
- Polydiacetylene-based materials and applications
- Potato Plant Research
- Recycling and utilization of industrial and municipal waste in materials production
- Advanced ceramic materials synthesis
- Heat and Mass Transfer in Porous Media
- Advanced MRI Techniques and Applications
- Catalysis and Hydrodesulfurization Studies
- Concrete and Cement Materials Research
- Metal-Organic Frameworks: Synthesis and Applications
- Wastewater Treatment and Nitrogen Removal
- Chemical Synthesis and Characterization
- Advanced Sensor and Energy Harvesting Materials
- Adsorption and biosorption for pollutant removal
- Industrial Gas Emission Control
Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry
2005-2023
Universidad de Granada
2009-2020
Czech Academy of Sciences
2006-2013
SINTEF
2005
Leipzig University
2005
University of Chemistry and Technology, Prague
2002-2003
Shape-selective reactions: Highly selective catalysts are obtained by alkaline and subsequent acid leaching of conventionally prepared zeolites. Active sites that located in the shape-selective environment micropores accessible through mesopores (see picture) provide high selectivity activity acid-catalyzed reactions. As a service to our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed may be re-organized for online delivery, but...
Diffusivities of n-octane in particles industrial fluid catalytic cracking (FCC) catalysts and zeolite USY, which is the main zeolitic component particles, are reported. Diffusion measurements have been performed by using pulsed field gradient (PFG) NMR for a broad range molecular displacements temperatures. The recorded diffusivities used to evaluate relevance various transport modes FCC catalysts, such as diffusion micropores crystals located through surface layer these crystals, meso-...
Periodic DFT molecular dynamics and FTIR spectroscopy were used to investigate the cationic sites of ferrierite exchanged with Co(II) Cu(II) their complexes NO. Particular attention was paid effect Al siting in six-membered rings forming on structure these corresponding binding energies Me(II) (Me = Co Cu). Our calculations show that both cations upon induce a rearrangement local zeolite framework. The is significant for α β-2 while it minor β-1 site. Comparison observed theoretical NO...
Carbon aerogels and xerogels were successfully prepared from phloroglucinol-phenol mixtures characterized by different techniques to determine their potential. We examined the influence of phloroglucinol/phenol ratio, reactant concentration, cure conditions, drying method on morphology porosity samples. The gelation time was found be independent ratio in spite reactivities both monomers. In general, carbon have a high volume mesopores micropores without diffusion restrictions. are denser...
Here, we show a spectroscopic study of the formation and oxidation properties α-oxygen originating from O2 dissociation over binuclear Fe(II) structure in Fe-ferrierite. The investigation its formation, stability, methane toward methanol at elevated temperatures was confirmed by situ FTIR spectroscopy mass spectrometry. For deeper insight into redox Fe centers embedded ferrierite, Mössbauer X-ray adsorption spectroscopies were used as complementary methods. In activity test results recorded...
Hochselektive Katalysatoren entstehen bei der basischen und anschließenden sauren Auslaugung konventionell hergestellter Zeolithe. Die aktiven Zentren, die in formselektiven Umgebung von Mikroporen liegen über Mesoporen zugänglich sind (siehe Bild), führen säurekatalysierten Reaktionen zu hohen Selektivitäten Aktivitäten. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed may be re-organized for...
The influence of cationic, anionic, and nonionic surfactants (S) on the characteristics carbon xerogels was analyzed. polymerization resorcinol (R) formaldehyde (F) developed in an aqueous solution S without any additional catalyst. gels obtained were dried air to obtain organic then carbonized xerogels. prepared samples characterized by FTIR, TG, SEM, N2 CO2 adsorption. formation RF−S copolymers observed for cationic surfactants, but this not anionic S, probably because repulsive...
The resorcinol (R)-formaldehyde (F) polymerization was carried out in different experimental conditions to obtain RF/Mo doped carbon xerogels with morphology, porosity and nature dispersion of metal. Attractive or repulsive electrostatic interactions were forced the starting aqueous solution RF-monomers using synthesis conditions, namely, combinations cationic anionic surfactants, Mo-precursors pH values. results showed that when both surfactant Mo-precursor used at neutral pH, attractive...
Distant binuclear cationic M(II) centers in transition-metal-exchanged zeolites were shown to activate dioxygen by its splitting at room temperature form a pair of very active oxygen species (i.e., α-oxygens) able subsequently oxidize methane methanol temperature. Selective oxidations and other hydrocarbons are extreme importance because their potential for the transformation valuable products. The reactivity α-oxygens with dihydrogen was investigated obtain insight into these unique...
Here, we present the unique redox properties of distant binuclear iron centers in Al-rich *BEA zeolite O2 splitting and CH4 oxidation. was obtained via a template-free synthesis procedure guaranteeing low-defected structure high fraction Al-pairs enabling stabilization centers. By employment multispectroscopic in-situ approach (Mössbauer X-ray absorption), formation active oxygen over confirmed, subsequent oxidation studied. Spontaneous release reaction products to gas stream, representing...