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Article
Features of the Real Structure of Metallic Silver Nanoparticles Located in Channels of Mesoporous Silicate SBA-15
The features of diffraction on silver nanoparticles located in channels of mesoporous silicate SBA-15 are analyzed. A computer simulation of diffraction patterns is performed for crystallites with different si...
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Article
Experimental Evaluation of the Properties of 3D Porous Bone Substitute Based on Calcium Phosphate on the Model of Monocortical Diaphysial Femur Defect in Rats
A new alloplastic high-permeable material based on tricalcium phosphate with Kelvin architectonics created by stereolithographic 3D-printing was studied in vivo. A monocortical defect of the femur was modeled in ...
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Article
Effects of Alkali Element Do** and Synthesis Conditions on the Genesis of the Phase Composition of Alumina–Chromium Catalysts
The influence of modifying additives and synthesis conditions on the genesis of the phase composition of alumina–chromium catalysts was studied by differential dissolution (DD) and X-ray diffraction (XRD) anal...
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Article
Effect of the Carbon Support on the Catalytic Activity of Platinum Nanoparticles in the Water Gas Shift Reaction
Platinum nanoparticles supported on carbon nanotubes display higher activity in the water gas shift reaction with close to 100% conversion of CO at 400–450 °C than for platinum supported on SKT a...
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Article
Role of the support in the formation of the properties of a Pd/Al2O3 catalyst for the low-temperature oxidation of carbon monoxide
The Pd/Al2O3 catalysts were prepared by the impregnation of aluminum hydroxide, which was synthesized by precipitation in the presence of polyvinyl alcohol, with a solution of palladium nitrate and were heat-trea...
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Article
A small-angle x-ray scattering study of the nanostructural features of high-ash carbon materials
Nanostructured carbon-silica composite materials are prepared from different compounds in one-pot. They are characterized by BET, transmission electron microscopy, X-ray diffraction, and small-angle X-ray scat...
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Article
XAFS structural study of specific features of the active component of model palladium catalysts
Model low-percentage metal oxide palladium catalysts are prepared from acetate complexes of Pd and Mn to study the nature of the activity and the genesis of nanostructured membrane catalyst Pd-Mn systems. A co...
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Article
Structural features of the components of copper-cerium-zirconium oxide catalysts
The structure of supports (ceria and zirconia) for supported copper catalysts for the processes of hydrogen obtaining and purification is studied. The formation features of the structure of zirconia annealed a...
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Article
Catalytic properties of M-Cu/ZrO2 (M = Fe, Co, Ni) in steam reforming of ethanol
We show that bicomponent supported catalysts M-Cu/ZrO2 (M = Fe, Co, Ni) are considerably more efficient than Cu/ZrO2 in steam reforming of ethanol at 350-550 °C. We have found that Fe-Cu/ZrO2 has increased activi...
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Article
Highly effective water adsorbents based on aluminum oxide
A method of preparation of a stable, high performance water adsorbent with the phase composition η-Al2O3 + γ-Al2O3 + χ-Al2O3 from thermally activated hydrargillite has been developed. The synthesis procedure does...
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Article
Influence of the temperature of calcination of bayerite-containing aluminum hydroxide pellets on the water vapor adsorption capacity and acid-base properties of alumina
The paper considers the influence of the temperature of calcination (350–550°C) of alumina-based water adsorbents prepared from bayerite-containing aluminum hydroxide on the static water sorption capacity at h...
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Article
Effect of surfactants on the structure and texture characteristics of aluminum oxide
The effect of surfactants (polyvinyl alcohol and cetyltrimethylammonium bromide), which were introduced at the aluminum hydroxide synthesis stage, on the structure and texture characteristics of aluminum oxide...
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Article
Spin-wave resonance spectra in bilayer magnetic films
The anti-Hermitian part of the high-frequency susceptibility tensor components in a bilayer film is calculated by solving the equation of motion for magnetization taking into account dam** and using the exch...
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Article
A study of the local structure of aluminas obtained by different methods
The local structure of aluminas obtained from hydroxides (pseudo-boehmites) synthesized by different methods is studied using the radial density distribution function,. The occupancy of the cation sites of dif...
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Article
Structure of Zirconia Nanoparticles used for Pillaring of Clay
SAXS and EXAFS were applied to study genesis of polynuclear zirconium hydroxyspecies in pillaring solutions as dependent upon the zirconium concentration, addition of alkaline-earth chlorides and aging. After ...
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Article
Nanosized Au/C catalyst obtained from a tetraamminegold(III) precursor: Synthesis, characterization, and catalytic activity in low-temperature CO oxidation
A method in which the water-soluble complex [Au(NH3)4](NO3)3 is used as the active-component precursor is suggested for preparing nanosized Au/C catalysts (C = Sibunit, a mesoporous carbon material). The complex ...
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Article
Determination of the local structure of a highly dispersed Pd-Nanosystem located on a titanium dioxide carrier
This work is devoted to a structural study of a highly dispersed Pd nanosystem, which is stabilized in the TiO2 matrix, by XAFS spectroscopy. Nanocomposite was prepared from bimetallic PdCo(μ-OOCMe)4(NCMe) precur...
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Article
Construction of the model radial distribution curves with regard to the features of X-ray diffraction experiment
A method to construct model radial distribution functions (RDFs) from the already known structural data is described. The method includes the procedures to calculate termination ripples that always appear on t...
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Article
Effect of hydrothermal treatment on the composition and structure of Pt(IV) hydroxo complexes as model precursors of the active component in Pt/Al2O3 catalysts
The influence of hydrothermal treatment conditions (temperature, duration, acidity of the medium) on the structural and chemical transformations of the complex H2[Pt(OH)6] was studied. The composition and structu...
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Article
Influence of the texture and acid-base properties of the alumina-containing support on the formation of Co(Ni)-Mo catalysts for deep hydrodesulfurization of the diesel fraction
The influence of the texture of γ-Al2O3 on the formation of Co(Ni)-Mo catalysts for hydrodesulfurization of the diesel fraction is studied. As shown by low-temperature N2 adsorption, X-ray diffraction, IR spectro...
