A5008149942- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Microwave Dielectric Ceramics Synthesis
- Thermal Expansion and Ionic Conductivity
- Ferroelectric and Piezoelectric Materials
- Catalysis and Oxidation Reactions
- Nuclear materials and radiation effects
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Crystal Structures and Properties
- Physics of Superconductivity and Magnetism
- Fuel Cells and Related Materials
- Crystallization and Solubility Studies
- Catalytic Processes in Materials Science
- Perovskite Materials and Applications
- Chemical Synthesis and Characterization
- X-ray Diffraction in Crystallography
- Multiferroics and related materials
- Solid-state spectroscopy and crystallography
- High-pressure geophysics and materials
- Advancements in Battery Materials
- Electrochemical Analysis and Applications
- Inorganic Chemistry and Materials
Lomonosov Moscow State University
2014-2024
National Research University Higher School of Economics
2019-2024
Kurchatov Institute
2024
Moscow State University
2009-2022
Research Institute VOLGA (Russia)
2020
Stockholm University
2003-2015
Institute of Problems of Chemical Physics
2008
Lawrence Berkeley National Laboratory
2008
University of Antwerp
2005-2008
Nikolaev Institute of Inorganic Chemistry
2007
The main requirements to cathode materials for intermediate temperature solid oxide fuel cells are considered with regard the mechanism of oxygen reduction on cathode. Factors that affect oxide-ion and electronic conductivity also thermal expansion coefficient compounds perovskite structure discussed. crystal structure, high-temperature properties electrochemical characteristics most promising based oxygen-deficient complex oxides cobalt layered perovskite-like nickel copper analyzed....
The review addresses and highlights the main results of research on physicohemical properties single-phase composite materials based transition metal oxides in relation to their practical application as electrode for symmetrical solid oxide fuel cells. electronic structures thermodynamic stability with perovskite structure are discussed. A detailed consideration is given thermal behaviour, chemical stability, electrical conductivity electrochemical a broad range iron-, chromium-...
The perovskite-related crystal structure of the compound Sr0.7Y0.3CoO2.62 was determined and refined using synchrotron X-ray neutron powder diffraction, in space group I4/mmm, a = 7.6237(8) Å c 15.314(2) Å, to RI 0.041 data set. It contains layers CoO6 octahedra, perpendicular axis, alternating with partially disordered oxygen-deficient layers. Further characterization electron diffraction high-resolution microscopy showed that an additional superstructure present some crystallites....
Oxygen diffusion in ${\text{Sr}}_{0.75}{\text{Y}}_{0.25}{\text{CoO}}_{2.625}$ is investigated using molecular dynamics simulations conjunction with an established set of Born model potentials. We predict activation energy for 1.56 eV the temperature range 1000--1400 K. observe extensive disordering oxygen ions over a subset lattice sites. Furthermore, ion both $a\text{\ensuremath{-}}b$ plane and along $c$ axis requires same rate-limiting hops. It predicted that transport therefore isotropic.
The crystal and magnetic structures of brownmillerite-like Sr(2)Co(1.2)Ga(0.8)O(5) with a stable Co(3+) oxidation state at both octahedral tetrahedral sites are refined using neutron powder diffraction data collected 2 K (S.G. Icmm, = 5.6148(6) Å, b 15.702(2) c 5.4543(6) Å; R(wp) 0.0339, R(p) 0.0443, χ(2) 0.775). very large tetragonal distortion CoO(6) octahedra (1.9591(4) Å for Co-O(eq) 2.257(6) Co-O(ax)) could be beneficial the stabilization long-sought intermediate-spin in perovskite-type...
Abstract Hydrogen peroxide has been detected as a reaction intermediate in the electrochemical oxygen reduction (ORR) on transition‐metal oxides and other electrode materials. In this work, we studied electrocatalytic catalytic reactions of hydrogen set Mn oxides, 2 O 3 , MnOOH, LaMnO MnO 4 that adopt different crystal structures to shed light mechanism ORR these We then combined experiment with kinetic modeling objective correlate differences activity kinetics elementary steps, uncovered...
The crystal structure and magnetic ordering in ${\text{Sr}}_{3}{\text{YCo}}_{4}{\text{O}}_{10.5+\ensuremath{\delta}}$, $\ensuremath{\delta}=0.02$ 0.26 compounds have been revisited a detailed neutron diffraction study. is of $G$-type, with the Co moments being aligned along $c$ axis tetragonal cells. In contrast to previous studies, we, however, find an important peculiarity structures title compounds, namely, moment magnitudes are different layers containing ions oxygen coordination. Along...
The brownmillerite-type A 2B 2O 5 structure is considered as a parent one, giving rise to different derivatives: layered double perovskites, A-site and anion-vacancy-ordered the perovskite-like compounds with crystallographic shear planes. structural relationships synthesis pathways for these classes of materials are discussed particular attention ordering at or B sublattices, anion vacancy ordering, their mutual interaction.
Three different perovskite-related phases were isolated in the SrGa(1-x)Sc(x)O(2.5) system: Sr(2)GaScO(5), Sr(10)Ga(6)Sc(4)O(25), and SrGa(0.75)Sc(0.25)O(2.5). Sr(2)GaScO(5) (x = 0.5) crystallizes a brownmillerite-type structure [space group (S.G.) Icmm, 5.91048(5) Å, b 15.1594(1) c 5.70926(4) Å] with complete ordering of Sc(3+) Ga(3+) over octahedral tetrahedral positions, respectively. The crystal Sr(10)Ga(6)Sc(4)O(25) 0.4) was determined by Monte Carlo method refined using combination...
The crystal and magnetic structures of ${\text{Sr}}_{0.7}{\text{Y}}_{0.3}{\text{CoO}}_{2.62}$ were studied at high pressures up to 30 5 GPa by means x-ray neutron diffraction, respectively. An evidence for the pressure-induced change in spin state ${\text{Co}}^{3+}$ ions octahedral coordination from intermediate low was found a behavior Co-O bond lengths obtained ordered moments values. tetrahedral five-coordinated oxygen deficient layers remains stable under pressure. A rapid suppression...
Abstract A previously unknown double ceric sodium phosphate hydrate Na 1.97 Ce 1.03 (PO 4 ) 2 ⋅ x H O containing both and cerous cations was obtained by the hydrothermal treatment of amorphous mixed with a hydroxide aqueous solution. The presence 3+ in structure proved HERFD‐XANES ESR spectroscopy. Iterative transformation factor analysis data allowed estimating content as 10 % total cerium. Water =0.55 has been determined thermogravimetric combined mass‐spectrometry data. compound solved...