A5009340748- Catalytic Processes in Materials Science
- Nanomaterials for catalytic reactions
- Catalysis and Hydrodesulfurization Studies
- Catalysis and Oxidation Reactions
- nanoparticles nucleation surface interactions
- Advanced Photocatalysis Techniques
- Advanced Chemical Physics Studies
- Electrocatalysts for Energy Conversion
- Advanced NMR Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Catalysts for Methane Reforming
- TiO2 Photocatalysis and Solar Cells
- Copper-based nanomaterials and applications
- Hydrogen Storage and Materials
- Catalysis for Biomass Conversion
- Zeolite Catalysis and Synthesis
- Quantum, superfluid, helium dynamics
- X-ray Diffraction in Crystallography
- Ammonia Synthesis and Nitrogen Reduction
- Machine Learning in Materials Science
- Crystallization and Solubility Studies
- Gas Sensing Nanomaterials and Sensors
- Atomic and Subatomic Physics Research
- Advancements in Battery Materials
- Electronic and Structural Properties of Oxides
Boreskov Institute of Catalysis
2015-2024
Novosibirsk State University
2008-2024
Siberian Branch of the Russian Academy of Sciences
2011-2024
Novosibirsk Tuberculosis Research Institute
2018
TU Wien
2016
Russian Academy of Sciences
2011
Abstract The hyperpolarization of heteronuclei via signal amplification by reversible exchange (SABRE) was investigated under conditions heterogeneous catalysis and microtesla magnetic fields. Immobilization [IrCl(COD)(IMes)], [IMes=1,3‐bis(2,4,6‐trimethylphenyl), imidazole‐2‐ylidene; COD=cyclooctadiene] catalyst onto silica particles modified with amine linkers engenders an effective SABRE (HET‐SABRE) that used to demonstrate a circa 100‐fold enhancement 15 N NMR signals in N‐pyridine at...
Pd-In/Al2 O3 single-site catalyst was able to show high selectivity (up 98 %) in the gas phase semihydrogenation of propyne. Formation intermetallic Pd-In compound studied by XPS during reduction catalyst. FTIR-CO spectroscopy confirmed nature reduced at temperature. Utilization propyne with parahydrogen allowed produce ≈3400-fold NMR signal enhancement for reaction product propene (polarization=9.3 %), demonstrating large contribution pairwise hydrogen addition route. Significant as well...
Abstract Parahydrogen‐induced polarization (PHIP) was successfully utilized to demonstrate the strong metal–support interaction (SMSI) effect for palladium supported on titania catalysts. Heterogeneous hydrogenation of 1,3‐butadiene over Pd/TiO 2 catalysts led formation 1‐ and 2‐butenes butane, hyperpolarized products were obtained if parahydrogen used in reaction. However, reduced H flow at 500 °C before reaction, observed levels significantly lower or even zero, which indicative...
Pt nanoparticles supported on carbon are an important technological catalyst. A corresponding model catalyst was prepared by physical vapor deposition (PVD) of sputtered HOPG (highly oriented pyrolytic graphite). The substrate before and after sputtering as well the Pt/HOPG system annealing were examined XPS STM. This yielded information surface density defects, which serve nucleation centres for Pt, size distribution (mean size/height) nanoparticles. Two different catalysts with mean sizes...
For bimetallic Pd–Au/HOPG model catalysts, reversible enrichment of the surface by Pd under CO oxidation conditions was found using a near-ambient pressure X-ray photoelectron spectroscopy technique. Density functional calculations combined with topological energy expression method were applied to reveal mechanism this phenomenon and quantify stability different arrangements metal atoms in PdAu nanoparticles presence adsorbate. According results computational approach, adsorption already at...
Model bimetallic Pd-Au/HOPG catalysts have been investigated in the CO oxidation reaction using a combination of NAP XPS and MS techniques. The samples shown catalytic activity at temperatures above 150 °C. redistribution Au Pd on surface depending conditions has demonstrated XPS. enrichment particles' under gas mixture shown. Apparently, adsorption induces segregation surface. Heating sample °C decomposes Pd-CO state due to desorption simultaneous Pd-Au alloy formation takes place. Cooling...
The direct synthesis of methanol via the hydrogenation CO2, if performed efficiently and selectively, is potentially a powerful technology for CO2 mitigation. Here, we develop an active selective Cu-Zn/SiO2 catalyst by introducing copper zinc onto dehydroxylated silica surface organometallic chemistry atomic layer deposition, respectively. At 230 °C 25 bar, optimized shows intrinsic formation rate 4.3 g h-1 gCu-1 selectivity to 83%, with space-time yield 0.073 gcat-1 at contact time 0.06 s...
Utilizing CO2 as sustainable carbon source requires its activation by catalytically active oxides on which can form different surface bound carbonaceous species. This may be promoted or even enabled hydroxyl groups. We have investigated the interaction of with a ZrO2 model surface, i.e. O-Zr-O trilayer grown Pt3Zr(0001), in absence and presence H2O, employing situ near ambient (atmospheric) pressure X-ray photoemission spectroscopy (NAP-XPS) infrared reflection absorption (IRAS). Whereas...
The successful transfer of parahydrogen-induced polarization to 15N spins using heterogeneous catalysts in aqueous solutions was demonstrated. Hydrogenation a synthesized unsaturated 15N-labeled precursor (neurine) with parahydrogen (p-H2) over Rh/TiO2 yielded hyperpolarized structural analog choline. As result, enhancements two orders magnitude were achieved for the 15N-ethyl trimethyl ammonium ion product deuterated water at elevated temperatures. Enhanced NMR spectra successfully acquired...
A supported metal catalyst was designed, characterized, and tested for aqueous phase heterogeneous hydrogenation of vinyl acetate with parahydrogen to produce 13 C-hyperpolarized ethyl potential biomedical applications. The Rh/TiO2 a loading 23.2 wt % produced strongly hyperpolarized C-enriched acetate-1-13 C detected at 9.4 T. An approximately 14-fold signal enhancement using circa 50 gas without taking into account relaxation losses before after polarization transfer by magnetic field...
An efficient method for the deposition of ionic platinum species PtOx onto a TiO2 surface was developed on basis light-induced activation [Pt(NO3)6]2- anion. The deposited with an effective Pt oxidation state between +4 and +2 have oxygen-made environment include single ion centers {PtOn} polyatomic ensembles {PtnOm} connected to Pt-O-Ti bonds. resulting PtOx/TiO2 materials were tested as photocatalysts hydrogen evolution reaction (HER) from water ethanol mixture shown uniquely high activity...