A5004129556- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Zeolite Catalysis and Synthesis
- Metal-Organic Frameworks: Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Ammonia Synthesis and Nitrogen Reduction
- Chemical Looping and Thermochemical Processes
- Advanced Chemical Physics Studies
- Catalysis and Hydrodesulfurization Studies
- Carbon Dioxide Capture Technologies
- Mesoporous Materials and Catalysis
- Advanced Nanomaterials in Catalysis
- Crystallography and molecular interactions
- Nanomaterials for catalytic reactions
- Catalysts for Methane Reforming
- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Polyoxometalates: Synthesis and Applications
- Industrial Gas Emission Control
- Nanocluster Synthesis and Applications
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Computational Drug Discovery Methods
Bulgarian Academy of Sciences
2015-2024
Institute of General and Inorganic Chemistry
2015-2024
King Abdullah University of Science and Technology
2017
Delft University of Technology
2016
Ludwig-Maximilians-Universität München
2003-2010
LMU Klinikum
2010
Laboratoire Catalyse et Spectrochimie
2004-2009
Centre National de la Recherche Scientifique
2004-2009
École Nationale Supérieure d'Ingénieurs de Caen
2009
University of California, Davis
2006-2008
Using a combination of state-of-the-art computational modeling and Fourier transform infrared (FTIR) spectroscopy study the surface species formed during interaction CO2 or CO with activated (stoichiometric), reduced, hydroxylated ceria, CeO2, we assigned various experimentally observed vibrational modes to individual types species. We considered carbonates CO32–, formates HCO2–, hydrogen CO2(OH)− bound in ways ceria nanoparticle. Since structure carbonate is particularly versatile,...
Abstract The use of IR spectroscopy adsorbed CO for determination gold speciation on supported catalysts is reviewed. Different ionic and metallic sites (Au 3+ , Au + 0 – ) can be differentiated the basis frequency stability their surface carbonyl species formed after adsorption. In addition, study adsorption reaction with other gases provide unique information mechanisms catalytic reactions participation CO. Finally, results from complementary techniques such as X‐ray absorption...
A microporous Al trimesate-based metal–organic framework (MOF), denoted MIL-96-(Al), was selected as a porous hybrid filler for the processing of mixed matrix membranes (MMMs) CO2/N2 postcombustion separation. First, structural model MIL-96-(Al) initially reported revisited using combination synchrotron-based single-crystal X-ray diffraction, solid-state nuclear magnetic resonance spectroscopy, and density functional theory (DFT) calculations. In second step, pure crystals differing by their...
Adsorption of CO on Ni−ZSM-5 reveals the existence two kinds Ni2+ ions, with respective stretching frequencies being at 2220 and 2212 cm-1. The carbonyl complexes are resistant to evacuation room temperature, which is explained by high electrophilicity cations in a ZSM matrix. At 85 K presence CO, part Ni2+−CO species converted into Ni2+(CO)2 dicarbonyls (2204 cm-1) characterized very low stability easily lose one their ligands. Interaction 673−773 results preferential reduction ions form...
The interaction between O2 and reduced ceria nanocubes was mainly investigated using FTIR spectroscopy. Nanorods nanoparticles were also studied for comparison. Adsorption of at 100 K on unreduced produces only molecularly adsorbed Ce4+ sites. Ce3+ cations by H2 773 monitored the 2F5/2 → 2F7/2 electronic transition band 2133–2095 cm−1. This possesses a fine structure well resolved K. positions individual components depend environment, including presence nearby species such as OH groups. Even...
Adsorption of CO2 on MIL-53(Al) and NH2-MIL-53(Al) has been studied by Fourier transform infrared (FTIR) spectroscopy at different temperatures equilibrium pressures. For better interpretation the spectra 13CO2 was also utilized. It is established that with both samples low coverages forms O-bonded complexes structural OH groups (OH···O12CO). These species are characterized ν3(12CO2) 2337–2338 cm–1 two ν2(12CO2) modes around 662 650 cm–1. Simultaneously, ν(OH) hydroxyl red-shifted, while...
Abstract Nowadays, manufacturing of ultraviolet (UV) protective textiles is quite interesting for the outdoor workers to protect their bodies from harmful radiation. Herein, first time, durable UV-protective cotton were produced by modification with mixed metal–Ce organic framework. Cotton was interacted 1,2,4-tricarboxybenzene-2,4-anhydride through benzylation reaction. The benzylated (BTC–C = O@Cotton) then reacted two metal salts including Cerium salt obtain Ce–M–BTC–C O@Cotton. estimated...
Ni-ZSM-5 and Ni/SiO2 samples have been characterized by the IR spectra of adsorbed coadsorbed NO CO. Adsorption CO at room temperature on leads to formation Ni2+−CO species (ν(CO) 2192 cm-1) that are easily destroyed evacuation. The carbonyls formed after adsorption two types bands 2220 2212 cm-1. In line with this high frequency, both much more stable than highly resistant toward Reduction results in appearance Ni+ ions. With these ions form Ni+(CO)2 dicarbonyls (νs 2136 cm-1 νas 2092...
A Au/SiO2 sample was prepared by ammonia-assisted grafting using HAuCl4 as a gold precursor. Gold on the evacuated at 673 K is essentially in metallic form: adsorption of CO 100 results formation Au0–CO species (IR band 2122 cm–1 shifting to 2103 high coverage). Coadsorption and O2 even ambient temperature leads creation Auδ+ sites oxidation CO. On contrary, increase contact time between gradual reduction Au0 Auδ− species. The process slightly favored presence water strongly enhanced...
Hydrogen dissociation and spillover on supported metal nanoparticles have received renewed interest because these chemical processes are closely related to applications in heterogeneous catalysis hydrogen storage. In catalysis, can control the reaction rate selectivity of a wide range reactions, e.g. hydrogenation, synthesis methanol hydroisomerization. this work, we combine three spectroscopic approaches, i.e. FT-IR spectroscopy donated electrons, co-adsorbed CO H/D exchange, obtain...
The state of the accessible copper ions in a Cu-basolite C300 sample (copper benzene-1,3,5-tricarboxylate) was studied by CO as an IR probe molecule. Low temperature adsorption on activated at 473 K results series carbonyl bands. Three intense sharp bands 2141, 2128 and 2123 cm(-1) are very sensitive to equilibrium pressure associated with polarized aromatic ring. bands, ca. 2192, 2178 2148 assigned three different kinds monocarbonyl species. At high coverage, principal carbonyls (2178...