A5101429724- Nanomaterials for catalytic reactions
- Catalysis for Biomass Conversion
- Catalysis and Hydrodesulfurization Studies
- Catalytic Processes in Materials Science
- Covalent Organic Framework Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Supercapacitor Materials and Fabrication
- Catalytic Cross-Coupling Reactions
- Catalysts for Methane Reforming
- Asymmetric Hydrogenation and Catalysis
- Membrane Separation and Gas Transport
- Carbon dioxide utilization in catalysis
- Conducting polymers and applications
- Biofuel production and bioconversion
- Polyoxometalates: Synthesis and Applications
- Mesoporous Materials and Catalysis
- Surface Chemistry and Catalysis
- Innovative Microfluidic and Catalytic Techniques Innovation
- Dendrimers and Hyperbranched Polymers
- Zeolite Catalysis and Synthesis
- Advancements in Solid Oxide Fuel Cells
- Catalysis and Oxidation Reactions
- Iron oxide chemistry and applications
- Subcritical and Supercritical Water Processes
- Organoboron and organosilicon chemistry
Tver State Technical University
2016-2025
ITMO University
2018
Here, we developed magnetically recoverable biocatalysts based on magnetite nanoparticles coated with an ultra-thin layer (about 0.9 nm) of chitosan (CS) ionically cross-linked by sodium tripolyphosphate (TPP). Excessive CS amounts were removed multiple washings combined magnetic separation. Glucose oxidase (GOx) was attached to the support via interaction N-hydroxysuccinimide (NHS) in presence carbodiimide (EDC) leading a covalent amide bond. These steps result formation biocatalyst for...
Lactose hydrogenation is a complex chemical process characterized by formation of numerous side products. Therefore, the synthesis efficient catalysts for lactose and investigation kinetics this are important increasing lactitol yield. Synthesis nanocatalysts based on ruthenium-containing nanoparticles (NPs) formed in pores hypercrosslinked polystyrene (HPS) modified with amino groups their catalytic properties described current work. The Ru species were incorporated HPS using wet...
The synthesis of catalytically active bimetallic Au–Pd nanoparticles stabilized in hyper-cross-linked polystyrene (HPS) for Suzuki cross-coupling 4-bromoanisole (4-BrAn) and phenylboronic acid is presented. core–shell structure with a thin (less than 1 nm) Pd shell Au core was proven by X-ray diffraction high-angle annular dark-field scanning transmission electron microscopy combined energy-dispersive spectroscopy. More 2-fold increase 4-BrAn conversion found comparison monometallic Pd/HPS....
Hydrogenation of levulinic acid (LA) obtained from cellulose biomass is a promising path for production γ-valerolactone (GVL)—a component biofuel. In this work, we developed Ru nanoparticle containing nanocomposites based on hyperbranched pyridylphenylene polymer, serving as multiligand and stabilizing matrix. The functionalization the nanocomposite with sulfuric significantly enhances activity catalyst in selective hydrogenation LA to GVL allows reaction proceed under mild conditions (100...
Here, we report the development of a novel bifunctional nanobiocatalyst for one-pot cascade transformation carboxymethyl cellulose (CMC) to D-sorbitol. The is based on magnetic nanoparticle aggregates (MNAs) functionalized with chitosan (CS) cross-linked by tripolyphosphate (TPP). It contains two types catalytic sites: cellulase (Cel, 5 wt.%) and Ru (3 nanoparticles (NPs) 0.7 nm in diameter. To optimize structure composition, first synthesized biocatalyst, MNA-CSP-Cel (CSP stands CS layer...
Supercritical (SC) fluid technologies are well-established methods in modern green chemical synthesis. Using SC fluids as solvents instead of traditional liquids gives benefits higher diffusivity and lower viscosity, which allows mass transfer intensification and, thus, an increased production rate transformations. Therefore, a conjugation heterogeneous catalysis with media is large step toward chemistry. Tetralin (TL) important hydrogen donor solvent used for biomass liquefaction. In...
This paper describes synthesis of Pd-containing catalysts Suzuki cross-coupling based on amino-functionalized hyper-cross-linked polystyrene at variation Pd precursor nature (PdCl2, PdCl2(CH3CN)2, or PdCl2(PhCN)2). The investigation the influence palladium oxidation state (Pd(II) Pd(0)) and form (Pdn clusters nanoparticles) rate 4-bromoanisole phenylboronic acid is discussed. Developed are shown to allow achieving conversion higher than 98% under mild reaction conditions. Independently...
Here, the development of a new catalyst is reported for selective furfural (FF) hydrogenation to furfuryl alcohol (FA) based on about 7 nm sized Pd-Cu alloy nanoparticles (NPs) formed in inexpensive, commercially available micro/mesoporous hypercrosslinked polystyrene (HPS). A comparison catalytic properties as-synthesized and reduced (denoted "r") catalysts as well monometallic palladium NPs showed considerable enhancement performance Pd-Cu/HPS-r compared other studied, resulting 100 % FF...
Postimpregnation of Pd nanoparticles (NPs) stabilized within hyper-cross-linked polystyrene with sodium or potassium hydroxides optimal concentration was found to significantly increase the catalytic activity for partial hydrogenation C–C triple bond in 2-methyl-3-butyn-2-ol at ambient hydrogen pressure. The alkali metal hydroxide accelerates transformation residual Pd(II) salt into Pd(0) NPs and diminishes reaction induction period. In addition, selectivity desired 2-methyl-3-buten-2-ol...
This paper describes the synthesis of Pd-containing catalysts based on nonfunctionalized hypercrosslinked polystyrene via impregnation with Pd acetate. Developed nanoparticulate catalyst allowed achieving conversion aryl halide up to 90% in Suzuki cross-coupling reaction under mild conditions and at absence phase-transfer agents. During selective hydrogenation triple C-C bond 2-methyl-3-butyn-2-ol, 96% selectivity respect corresponding olefinic alcohol was found 95% conversion. The...
This work is addressed to the phenomenon of catalyst deactivation taking place during repeated uses in reaction Suzuki-Miyaura (S-M) cross-coupling, which widely applied industry for C-C bond formation. Ligandless catalysts based on Pd(0) NPs supported hyper-cross-linked polystyrene (HPS) two types (non-functionalized and bearing tertiary amino groups) were studied a model S-M between 4-bromoanisole phenylboronic acid. Synthesized shown be highly active under mild conditions. HPS allows...
Abstract This work is devoted to the investigation of possibility use Ru-containing catalysts on basis polymeric matrix hypercrosslinked polystyrene (HPS) in hydrogenation levulinic acid (LA) gamma-valerolactone (GVL). HPS-based were synthesized at variation HPS type (MN100 bearing amino groups or MN270 without functional groups) and metal content. Catalyst 5%-Ru/MN100 was shown compete with commercial 5%-Ru/C allow carrying out LA aqueous medium high yields GVL (more than 99%).
Abstract Crosslinked polymers are considered to be promising materials for supporting catalysts that effectively applied in different reactions. However, the application of polymer‐supported high‐temperature processes is limited by their temperature stability. Besides thermal degradation, changes can cause restructuring polymer network because valence angles and bond lengths. Thus, study influence on structure crosslinked styrene–divinylbenzene (StDVB) copolymers an important task. In this...