A5027562190- Analytical Chemistry and Chromatography
- Chromatography in Natural Products
- Protein purification and stability
- Advancements in Solid Oxide Fuel Cells
- Energetic Materials and Combustion
- Electronic and Structural Properties of Oxides
- Chemical Thermodynamics and Molecular Structure
- Visual perception and processing mechanisms
- Rocket and propulsion systems research
- Microfluidic and Capillary Electrophoresis Applications
- Field-Flow Fractionation Techniques
- Electrocatalysts for Energy Conversion
- Adsorption, diffusion, and thermodynamic properties of materials
- Analytical chemistry methods development
- Ophthalmology and Visual Impairment Studies
- Ferroelectric and Piezoelectric Materials
- Crystallization and Solubility Studies
- Integrated Circuits and Semiconductor Failure Analysis
- Catalysis and Oxidation Reactions
- Electrohydrodynamics and Fluid Dynamics
- Catalytic Processes in Materials Science
- Aerosol Filtration and Electrostatic Precipitation
- Minerals Flotation and Separation Techniques
- Mass Spectrometry Techniques and Applications
- Laser Material Processing Techniques
Deutsches Elektronen-Synchrotron DESY
2015-2023
Ministry of Health of the Russian Federation
2023
European X-Ray Free-Electron Laser
2022
Universität Hamburg
2015-2018
National Research Tomsk State University
2011-2017
Lomonosov Moscow State University
2009-2011
ITMO University
2005-2010
Russian Academy of Sciences
2010
St Petersburg University
2005
D. Mendeleyev University of Chemical Technology of Russia
2001
Abstract Exsolution of metal nanoparticles from perovskite-type oxides is a very promising approach to obtain catalysts with superior properties. One particularly interesting property exsolution the possibility electrochemical switching between different activity states. In this work, synchrotron-based in-situ X-ray diffraction experiments on electrochemically polarized La 0.6 Sr 0.4 FeO 3-δ thin film electrodes are performed, in order simultaneously insights into phase composition and...
Sophisticated IrO2(110)-based model electrodes are prepared by deposition of a 10 nm thick single-crystalline IrO2(110) layer supported on structure-directing RuO2(110)/Ru(0001) template, exposing regular array mesoscopic rooflike structures. With this electrode together with the dedicated in situ synchrotron based techniques (SXRD, XRR) and ex characterization (SEM, ToF-SIMS, XPS), corrosion process an acidic environment (pH 0.4) is studied different length scales. Potential-induced pitting...
Pt-Rh alloy nanoparticles on oxide supports are widely employed in heterogeneous catalysis with applications ranging from automotive exhaust control to energy conversion. To improve catalyst performance, an atomic-scale correlation of the nanoparticle surface structure its catalytic activity under industrially relevant operando conditions is essential. Here, we present x-ray diffraction data sensitive combined situ mass spectrometry during near ambient pressure CO oxidation. We identify...
We have studied the properties of laser-induced microplasma (LIMP) emerging in ablation a strongly light-absorbing target regime confinement spatial plasma expansion. The LIMP particle temperature is shown to be higher this case than free It found that amplitude pressure pulse an order magnitude open surface case. feasibility writing microstructures on transparent dielectrics with use demonstrated: microlens arrays and different diffraction elements are made.
Three different platinum oxides are observed by in situ X-ray diffraction during electrochemical potential cycles of thin film model electrodes on yttria-stabilized zirconia (YSZ) at a temperature 702 K air. Scanning electron microscopy and atomic force performed before after the experiments indicate that approximately 20% electrode has locally delaminated from substrate forming pyramidlike blisters. The their locations identified as (1) an ultrathin PtOx buried Pt/YSZ interface, which forms...
Perovskite-type La 0.57 Li 0.29 TiO 3 (LLTO) is a promising solid electrolyte material with high Li-ion conductivity. However, its experimental electrochemical stability window not precisely known, and thus the compatibility potential electrode materials partly unclear. In this contribution, we present results from analytical experiments to elucidate of LLTO when being polarized Li-ion-blocking Pt electrodes. Above 2.5 V, darkened color front starts moving cathode anode, leading degradation....
We employed operando anomalous surface X-ray diffraction to investigate the buried interface between cathode and electrolyte of a model solid oxide fuel cell with atomic resolution. The was studied under different oxygen pressures at elevated temperatures polarizations by external potential control. Making use effects Y Zr K-edges allowed us resolve interfacial structure chemical composition (100)-oriented, 9.5 mol % yttria-stabilized zirconia (YSZ) single crystal below La0.6Sr0.4CoO3-δ...
The correlation between surface structure, stoichiometry and atomic occupancy of the polar MgAl2O4(100) has been studied with an interplay noncontact force microscopy, X-ray photoelectron spectroscopy diffraction under ultrahigh vacuum conditions. Al/Mg ratio is found to significantly increase as sputtered annealed in oxygen at intermediate temperatures ranging from 1073-1273 K. Al excess explained by observed where formation nanometer-sized pits elongated patches terminated step edges...
Corona discharge over a surface of alcohol, water, and kerosene with aluminum powder addition is applied to realize visualize number electrohydrodynamic phenomena at the interaction liquid. Thin film allows funnels motion in them appearing under an ion wind impact.
We investigated structural changes of the magnetite (001) surface upon exposure to water vapor at pressures up 10 mbar as well atomic hydrogen using X-ray diffraction, scanning tunneling microscopy, infrared spectroscopy, and photoelectron spectroscopy. Following a full analysis, we found for both adsorbates that is roughening on an level, indicating significant iron diffusion in near-surface region room temperature. this process accompanied by lifting subsurface cation vacancy...
Negative corona multielectrode discharge over a surface of alcohol is applied to realize number electrohydrodynamic phenomena at the interaction with liquid (alcohol). Funnels and columns were realized in case two four upper electrodes. Columns reveal realization an instability liquid.
We report on platinum oxide formation during electrochemical anodic polarization of a film yttria-stabilized zirconia (YSZ) under oxygen potential control. The drives through the YSZ electrolyte towards nominally 175 nm thin Pt film, which we found to locally delaminate from substrate by forming nano-scale blisters. High resolution scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDX) mapping focused-ion beam (FIB)-prepared cross-sections single bubbles few micrometers...
Investigations devoted to the analysis of effective ionization processes at early discharge stages in propane-air mixture, propane concentration <10% atmospheric pressure, are first necessary step before air-propane real conditions. Necessary parameters excitation and these mixtures have been determined a wide range electric field. Thresholds calculated.
We report generation of ultra-broadband longitudinal acoustic coherent phonon wavepackets in SrTiO3 (STO) with frequency components extending throughout the first Brillouin zone. The are efficiently generated STO using femtosecond infrared laser excitation an atomically flat 1.6 nm-thick epitaxial SrRuO3 film. use x-ray diffraction at European X-Ray Free Electron Laser Facility to study dispersion and damping wavepackets. experimentally determined constants for multi-THz phonons compare...
An adaptive optical system with a subjective feedback loop is used to improve the visual acuity and determine aberrations of human eye. Corrections as many 12 low-order aberration modes were made, based on perceived sharpness test object observed through system. The vision was improved by adjustment weights orthogonal produced deformable mirror. Objective measurements correcting aspherical figures, obtained in independent correction cycles for one person, demonstrated good repeatability....