A5022773093- Magnetic and transport properties of perovskites and related materials
- Catalytic Processes in Materials Science
- Advanced Condensed Matter Physics
- Rare-earth and actinide compounds
- Advancements in Battery Materials
- ZnO doping and properties
- X-ray Diffraction in Crystallography
- Electrocatalysts for Energy Conversion
- Advanced Battery Materials and Technologies
- Magnetic Properties and Synthesis of Ferrites
- Ammonia Synthesis and Nitrogen Reduction
- Catalysis and Oxidation Reactions
- Electronic and Structural Properties of Oxides
- Catalysis and Hydrodesulfurization Studies
- Extraction and Separation Processes
- Copper-based nanomaterials and applications
- Electron and X-Ray Spectroscopy Techniques
- Advanced Photocatalysis Techniques
- Nanomaterials for catalytic reactions
- High-pressure geophysics and materials
- CO2 Reduction Techniques and Catalysts
- Multiferroics and related materials
- Caching and Content Delivery
- Hydrogen Storage and Materials
- Graphene research and applications
University of North Texas
2024
Yale-NUS College
2020-2023
M.N. Mikheev Institute of Metal Physics
2012-2020
Russian Academy of Sciences
2011-2015
Ural Branch of the Russian Academy of Sciences
2013-2014
Nitrate ion is a common pollutant in surface and groundwater. Hence, its catalytic conversion into ammonia at ambient conditions by electrochemical photoelectrochemical pathways an attractive alternative to current production from the energy-intensive high-carbon-featuring Haber-Bosch process. As such, developing highly active product-selective catalysts with good durability cost-effectiveness desired. In this work, exfoliated MoS2-x reported as selective electrocatalyst photoelectrocatalyst...
Co-doped TiO2 is one of the most extensively studied oxides for applying as dilute magnetic semiconductors due to its room temperature magnetism. Here we present results studies Ti0.97Co0.03O2 nanopowders synthesized by microwave-assisted hydrothermal method means X-ray diffraction, soft absorption spectroscopy (Ti L2,3 and Co spectra), hard (Co K 1s3p resonant inelastic scattering at edge. According diffraction data Ti spectra, all samples before thermal treatment exhibit anatase structure...
Cobalt-doped anatase Ti1–xCoxO2 (0 < x ≤ 0.04) nanopowders (with a particle size of 30–40 nm) were produced by the hydrothermal synthesis method. Morphology, structure, and thermal stability synthesized compounds examined using transmission electron microscopy, infrared spectroscopy, X-ray diffraction analysis. Using photoelectron cobalt ions are shown to have an oxidation state 2+, with titanium having tetravalent Ti4+. In as-prepared state, all investigated paramagnetic, value paramagnetic...
A combination of first-principles thermodynamics and density functional theory (DFT) was applied for the prediction sulfur-poisoned monomeric Cu/Fe species formed in SSZ-13 catalyst framework under selective catalytic reduction (SCR)-relevant conditions presence sulfur dioxide, ammonia, oxygen, water. Differences fresh were found Cu- Fe-SSZ-13 catalysts containing one Al (1Al sites) or two (2Al 6-membered rings (6MRs) 8-membered (8MRs). The impact ammonia concentration during low-...
Biodiesel is a promising renewable fuel, which may help to limit our dependence on fossil fuels. However, the presence of contaminants in biodiesel can affect Cu speciation Cu-SSZ-13 selective catalytic reduction (SCR) catalyst, resulting its deactivation and decreased durability. In situ K-edge X-ray absorption fine structure (XAFS) scanning during temperature-programmed hydrogen (H2-TPR) has been applied here for analysis catalysts aged using pure contaminated XAFS data were analyzed...
Noble metal-exchanged small-pore molecular sieves with chabazite topology are promising materials for automotive cold-start NOx emission control applications. A combination of first-principles thermodynamics and density functional theory was applied the prediction monomeric palladium, platinum, ruthenium species formed in 1Al or 2Al sites six-/eight-membered rings SSZ-13 framework presence SO2, NO, O2, H2O at temperatures between 0 1100 K. Calculations using gradient-corrected...
Biodiesel is an environmentally friendly fuel that may partially replace petroleum diesel in transportation. One possible disadvantage of biodiesel alkali and alkaline earth metals can significantly affect Cu speciation the elemental composition copper chabazite (Cu-CHA) catalysts used vehicle emission control units. To investigate this, we perform atomic-scale characterization Cu-SSZ-13 zeolites contaminated by Mg, K, Na using inductively coupled plasma-optical spectroscopy K-edge X-ray...
The electrochemical reduction of nitrate to ammonia is interest as an energy/environmentally friendly source for agriculture and energy applications a route toward groundwater purification. We report in situ photoemission data, results, density functional theory calculations that demonstrate vanadium oxide—prepared by ambient exposure V metal, with distribution surface 3+ 4+ oxidation states—specifically adsorbs reduces at pH 3.2 cathodic potentials. Negligible activity the absence NO 3 −...
We have performed a detailed study of the magnetic and electronic properties highly manganese-doped β-NaGdF4 β-NaEuF4 nanoparticles with narrow size distribution. XPS as well XRF experiments confirm successful doping 11 ± 2% Mn into nanoparticles, i.e., much higher concentration than has been previously reported for incorporation bivalent transition metal ions β phase NaREF4 (RE = rare earth) nanocrystals. Owing to high manganese concentration, we observed quenching Mn2+ emission in both...
Electron paramagnetic resonance, X‐ray photoelectron spectroscopy, field dependence of magnetization, diffraction, and transmission electron microscopy are applied for the characterization Al‐doped TiO 2 nanopowders with Fe impurities synthesized by autoclave‐assisted hydrothermal method annealed in vacuum or hydrogen. The sizes :(Al, Fe) nanoparticles estimated to be about 10–20 nm. It is proposed that Al ions presumably placed lattice interstitial positions. Moreover, 3+ can occupy...