A5057698997- Advancements in Solid Oxide Fuel Cells
- Magnetic and transport properties of perovskites and related materials
- Catalytic Processes in Materials Science
- Electronic and Structural Properties of Oxides
- Hydrogen Storage and Materials
- Advanced Condensed Matter Physics
- Quasicrystal Structures and Properties
- Thermal Expansion and Ionic Conductivity
- Catalysis and Oxidation Reactions
- Hybrid Renewable Energy Systems
- Phase-change materials and chalcogenides
- Nuclear materials and radiation effects
- MXene and MAX Phase Materials
- Eurasian Exchange Networks
- Mineralogy and Gemology Studies
- Advanced Memory and Neural Computing
- Advanced Photocatalysis Techniques
- Magnesium Alloys: Properties and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Nanocluster Synthesis and Applications
- Perovskite Materials and Applications
- Pigment Synthesis and Properties
- Laser-induced spectroscopy and plasma
- Advanced battery technologies research
- Rare-earth and actinide compounds
Shibaura Institute of Technology
2013-2024
Institut d'Economie Scientifique Et de Gestion
2021
Kanagawa University
2020
AGH University of Krakow
2013-2016
Abstract Ca 2 Fe O 5 (CFO) is a potentially viable material for alternate energy applications. Incorporation of nitrogen in (CFO-N) lattice modifies the optical and electronic properties to its advantage. Here, band structures CFO CFO-N were probed using Ultraviolet photoelectron spectroscopy (UPS) UV-Visible spectroscopy. The bandgap reduces from 2.21 eV 2.07 on post N incorporation along with clear shift valence indicating occupation 2p levels over band. Similar effect also observed CFO,...
The oxygen storage capacity, exchange kinetics, structure and thermodynamic stability were studied for hexagonal Y<sub>0.7</sub>Tb<sub>0.3</sub>MnO<sub>3+δ</sub> in air to assess its applicability separation from by a temperature-swing adsorption process.
Structural and oxygen content changes of hexagonal HoMnO<sub>3+δ</sub> manganite at the stability boundary in perovskite phase have been studied by X-ray diffraction thermogravimetry using <italic>in situ</italic> oxidation reduction processes elevated temperatures air.
Abstract Hexagonal Y 1− x R MnO 3+ δ (R: other than rare earth elements) oxides have been recently introduced as promising oxygen storage materials that can be utilized in the temperature swing processes for separation and air enrichment. In present work, average local structures of Tb- Ce-substituted 0.7 Tb 0.15 Ce 0.6 0.2 were studied, their storage-related properties evaluated. The fully oxidized samples show presence a significant amount highly oxygen-loaded so-called Hex3 phase,...
Two-dimensional (2D) materials, inclusive of molybdenum disulfide (MoS2), are auspicious due to their structure providing absorption sites and shorter diffusion paths. However, sheet restacking affects the functional properties, resulting in device’s low efficiency. A strategy is proposed combine MoS2 with MXene material. X-ray Diffraction data revealed peaks at d-spacings 6.07, 2.72, 2.49, 2.27, 1.82, 1.53 Å. photoelectron spectroscopy shows prominent for C 1s Ti 2p, no signal Al detected...
In this work, we present results showing modification of the oxygen storage-related properties perovskite-type oxides based on BaYMn 2 O 5+δ , having A-site layer-type cation order. Y 3+ is lightest among suitable cations, which allows to obtain such structural order, and at same time, it provides highest theoretical storage capacity. However, substitution by Sm cations may be beneficial, BaY 0.5 Mn material shows enhanced reduction kinetics. Furthermore, partial Ba 2+ Sr increases...
Choice of an appropriate chemical composition in a group A-site ordered LnBa 1-x Sr x Co 2-x Fe O 5+δ (Ln - selected lanthanides, Y) oxides may allow to obtain novel, potential cathode materials for IT-SOFC having desirable physicochemical properties, which can surpass those typical Ln 1-y y 3-δ perovskites. Layered ordering A sublattice (Ln-Ba ), resulting from significant difference between ionic radii, is observed compounds smaller cations, even substantial substitution Ba by Sr....
The need for improved UV emitting luminescent materials underscored by applications in optical communications, sterilization and medical technologies is often addressed wide bandgap semiconducting oxides. Among these, the Mg-doped ZnO system of particular interest as it offers opportunity to tune emission engineering its via doping control. However, both doped pristine congener, ZnO, suffer from being highly prone parasitic defect level emissions, compromising their efficiency light emitters...
It is documented that the mean radius r¯ of rare-earth cations occupying Y1-xRx sublattice in Y1-xRxMnO3+δ hexagonal oxides plays a decisive role terms thermodynamics and kinetics reactivity materials with oxygen, consequently, influences strongly oxygen storage performance thermal swing processes conducted air. samples designed being close to critical one, at border stability between hexagonal- perovskite-type phases, can reversibly incorporate/release significant amounts pure O2 or air...