A5030867238- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Catalysts for Methane Reforming
- Catalysis and Hydrodesulfurization Studies
- X-ray Diffraction in Crystallography
- Nuclear materials and radiation effects
- Catalysis for Biomass Conversion
- Crystallization and Solubility Studies
- Electrocatalysts for Energy Conversion
- Iron oxide chemistry and applications
- X-ray Spectroscopy and Fluorescence Analysis
- Metal-Catalyzed Oxygenation Mechanisms
- Advancements in Battery Materials
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Glass properties and applications
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Metal Extraction and Bioleaching
- Adsorption and biosorption for pollutant removal
- Advanced Battery Materials and Technologies
- Advanced Materials Characterization Techniques
- Zeolite Catalysis and Synthesis
- Metal complexes synthesis and properties
- Magnetism in coordination complexes
Zavaritsky Institute of Geology and Geochemistry
2025
Deutsches Elektronen-Synchrotron DESY
2016-2024
XiO Photonics (Netherlands)
2023
University of Wuppertal
2019-2021
Hamburg Institut (Germany)
2021
Argonne National Laboratory
2019
Kurchatov Institute
2012-2016
Moscow Institute of Physics and Technology
2013-2016
A.V. Topchiev Institute of Petrochemical Synthesis
2012-2015
Russian Academy of Sciences
2011-2015
Pt-CeO2-Al2O3 catalysts play an important role in diesel oxidation and three-way catalysis. In this study, the fast structural dynamics of both platinum ceria a 1 wt %Pt/5 %CeO2-Al2O3 catalyst prepared by flame spray pyrolysis have been systematically investigated under reducing oxidizing conditions to elucidate Pt–CeO2 interface for CO oxygen storage/release ceria. The showed enhanced catalytic activity, particularly after application reducing/oxidizing conditioning step at 250 °C, with...
Efficient oxygen evolution reaction (OER) electrocatalysts are pivotal for sustainable fuel production, where the Ni-Fe oxyhydroxide (OOH) is among most active catalysts alkaline OER. Electrolyte alkali metal cations have been shown to modify activity and intermediates, however, exact mechanism at question due unexplained deviations from cation size trend. Our X-ray absorption spectroelectrochemical results show that bigger shift Ni2+/(3+δ)+ redox peak OER lower potentials (however, with...
Beamline P64 at PETRA III is dedicated to x-ray absorption spectroscopy experiments which require high flux, like quick extended fine structure on the sub-second time scale, high-resolution resonant emission spectroscopy, and fine-structure of highly diluted systems. The beamline installed high-energy storage ring III. source a 2 m-long undulator. covers an energy-range from 4 keV 44 keV, was required by user community. Mirrors can be used reduce intensity higher harmonics, focus beam. A...
Abstract Na‐ion batteries have experienced rapid development over the past decade and received significant attention from academic industrial communities. Although a large amount of effort has been made on material innovations, accessible design strategies peculiar structural chemistry remain elusive. An approach to in situ construction new Na‐based cathode materials by substitution alkali sites is proposed realize long‐term cycling stability high‐energy density low‐cost cathodes. A...
Abstract Electronic metal–support interactions (EMSI) describe the electron flow between metal sites and a oxide support. It is generally used to follow mechanism of redox reactions. In this study CuO‐CeO 2 redox, an additional electrons from metallic Cu surface carbon species observed via combination operando X‐ray absorption spectroscopy, synchrotron powder diffraction, near ambient pressure edge fine structure diffuse reflectance infrared Fourier transform spectroscopy. An electronic...
Abstract Novel catalysts consisting of ruthenium nanoparticles encapsulated in cross‐linked matrices based on the poly(propylene imine) dendrimers 1st and 3rd generations have been synthesized with a narrow particle size distribution (3.8 1.0 nm, respectively). The resulting materials showed high activity for hydrogenation phenols aqueous media (specific catalytic reached turnover frequencies 2975 h −1 respect to hydrogen uptake). It has shown that use water as solvent leads 1.5 50‐fold...
A simple understanding on the trend of stability for transition metal carbides.
P2-type Fe- and Mn-based layered sodium transition metal oxides are promising positive electrode materials for batteries due to their high energy density low costs of the constituting metals. However, poor structural reversibility fast capacity decay have prevented breakthrough so far. Herein, real-time dynamic phase transitions fading mechanism P2 Na0.67Fe0.5Mn0.5O2 revealed by operando X-ray diffraction, operando/ex situ absorption spectroscopy, neutron powder pair distribution functions....
It is found that CH4 oxidation over Pt/Al2O3 catalyst at 330–460 °C can stably proceed via two distinctly different regimes identical feed gas composition: "low activity regime" and "high regime". Switching between the depends on O2 concentration direction of its change. For reaction mixture with constant methane 1%, incremental decrease in from 2.5% (O2/CH4 ∼ 2.5, lean conditions) to ∼1% 1, stoichiometric or rich results activation switching high regime. The remains active upon further...
Nanocatalysts PtAg/C with different distributions of components in bimetallic PtAg nanoparticles were synthesized by the methods simultaneous and sequential reduction Ag+ Pt(IV) carbon suspension, prepared on basis ethylene glycol–water solvent. The characterization atomic structure as obtained after acid treatment at 90 °C was performed Pt L3-edge extended X-ray absorption fine (EXAFS) using technique for determining local parameters absorbing atoms, which have nearest surrounding...
Reductive treatments with pulses of CO-rich atmosphere have been used to increase and maintain the low temperature activity a Pt/CeO2-based oxidation catalyst. A combination operando infrared thermography spatiotemporal-resolved quick scanning extended X-ray absorption fine structure spectroscopy on fixed bed microreactor unraveled that, apart from pulse length, reaction atmosphere, reactor temperature, also emerging heat during such activating has strong influence catalytic performance CO...
Nanostructured MgO doped with transition metals has been used to recycle nutrients from wastewater<italic>via</italic>struvite crystallization.
The enzyme tyrosinase contains a reactive side-on peroxo dicopper(II) center as catalytically active species in C-H oxygenation reactions. activity of the isomeric bis(μ-oxo) dicopper(III) form has been discussed controversially. synthesis [Cu2 (μ-O)2 (L1)2 ](X)2 ([O1](X)2 , X=PF6-, BF4- OTf- ClO4- ), stabilized by new hybrid guanidine ligand 2-{2-((dimethylamino)methyl)phenyl}-1,1,3,3-tetramethylguanidine (L1), and its characterization UV/Vis, Raman, XAS spectroscopy, well cryo-UHR-ESI mass...
Phosphorus (P) fertilizers from secondary resources became increasingly important in the last years. However, these novel P-fertilizers can also contain toxic pollutants such as chromium its hexavalent state (Cr(VI)). This hazardous form of is therefore regulated with low limit values for agricultural products even though correct determination Cr(VI) may be hampered by redox processes, leading to false results. Thus, we applied diffusive gradients thin-films (DGT) technique and compared...
The object of the present study includes grains platinum-group minerals (PGMs) from a concentrate, which was obtained during mining technogenic gold placer near Pervomaisky dunite-harzburgite massif (Central Urals). inner structure and chemical composition were studied using scanning electron microscopy microprobe analysis. Grains primary Ru-Os-Ir are overgrown by concentric-zonal rims secondary PGMs two types: 1) “corrosive” PGMs, replace 2) overprinted formed after PGMs. comprise areas...
The object of the present study includes grains platinum-group minerals (PGMs) from a concentrate, which was obtained during mining technogenic gold placer near Pervomaisky dunite-harzburgite massif (Central Urals). inner structure and chemical composition were studied using scanning electron microscopy microprobe analysis. Grains primary Ru-Os-Ir are overgrown by concentric-zonal rims secondary PGMs two types: 1) “corrosive” PGMs, replace 2) overprinted formed after PGMs. comprise areas...