Highly thermoconductive, active and selective catalysts based on commercial nickel foam for partial oxidation and dry reforming of methane have been designed. The developed catalysts have been synthesized by subjecting the nickel foam to electrochemical treatment providing the formation of nickel, molybdenum, tungsten, or cobalt oxide or hydroxide particles on the surface of the material. The catalysts provide the production of synthesis gas with a nearly 100% selectivity and a methane conversion of up to 98–100%.

Using 3D printing, plastic products with the topology of triply periodic minimal surfaces (TPMS) are prepared and their mechanical properties are studied. It is shown that the strength of the products is sufficient to apply them as sandwich panels and they have promising prospects as anechoic platings.

Corundum frameworks with triply periodic minimal surface (TPMS) topology.

The results of investigating the optical properties, chemical composition, and crystal structure of tungsten-oxide films annealed in vacuum and air at 700°C are presented. The films are deposited by means of reactive dc magnetron sputtering. The samples involving single films, as well as heterostructures with tungsten- and titanium-oxide films, located on quartz glass substrates are examined. It is ascertained that, in different samples, annealing leads to different changes in the optical properties, chemical composition, and crystal structure of the films.

The phase composition of the copper oxides films obtained by DC reactive magnetron sputtering at oxygen partial pressures of 0.06, 0.10, and 0.16 mTorr is studied by X-ray phase analysis (XRPA) before and after their heat treatment within the range 300–550°C. It is found that the original phase compositions of the films of each lot are different; after the heat treatment at 550°C, all the films contained only CuO of a monoclinic structure.

The influence of the target operation mode on the chemical composition and crystalline structure of copper oxide films deposited onto a quartz glass substrate has been studied using Raman spectroscopy and X-ray phase analysis. The films have been synthesized in an Ar + O-2 gaseous environment using two identical magnetrons, differing only by the method of target cooling.

A series of mixed alkali-zinc diphosphates in the form of poly- and single crystals have been synthesized. Their structural characteristics have been determined. The compounds Na2ZnP2O7 and K2ZnP2O7 have a layered structural type, whereas LiNaZnP2O7, LiKZnP2O7, NaKZnP2O7, Li12Zn4(P2O7)5, and K2Zn3(P2O7)2 have a framework structural type.

The effect of heat treatment on the crystal structure and optical properties of films of tungsten oxide WO3 has been studied. The films have been synthesized on a substrate made of quartz glass by reactive magnetron sputtering on a DC. The samples studied contained WO3 single layers and double layers of the WO3/TiO2 and TiO2/WO3 type. Each sample passed sequential heat treatments for 1 h: in air at 500°C, under vacuum at 700°C (residual pressure ≤5 × 10–5 Torr); and in air, at 500°C. It was found that at each stage of processing a polymorphic transition takes place in the WO3 films, which is affected by the orders of layers on the substrate.

The results of the preparation of nanoparticles of nickel hydroxide by the electrochemical method using electrodes made of nickel foam are presented. A topology of H + migration routes in Ni(OH) 2 and NiOOH was determined by the methods of crystallochemical analysis. It was revealed that these compounds are two-dimensional ion conductors with high ionic mobility. It was shown that supercapacitors based on these compounds can possess a high rate of charge (discharge).

The most typical results of studies on the chemical and phase compositions of the tungsten oxide films synthesized by different chemical and physical methods, including the films that have undergone additional thermal treatment in vacuum and in the air, are reviewed.

Based on the developed analytical description of the transmission spectrum in the visible range for a sample weakly absorbing film-transparent substrate, a technique for calculating the optical constants and thickness of simple metal oxides has been proposed. The capabilities of the calculation technique are demonstrated for an X-ray-amorphous film of tungsten oxide.

The effect of heat treatment on the optical properties of heterostructures containing titanium and tungsten oxide films is studied. The films were synthesized on a quartz glass substrate in low-temperature lowpressure plasma. It is found that the heat treatment of the samples containing the tungsten oxide films in vacuum at 700°C leads to the formation of hydrogen tungsten bronze with a cubic lattice. The crystallization processes that occur in the heterostructures are affected by both the temperature of the heat treatment and the sequence of the layers on the substrate.

We determined the distribution of extra-framework cesium and sodium atoms, as well as water molecules in the cavities of synthetic high-silica (Si/Al = 3.7) (Na, Cs)-rho-zeolite (Cs3.2Na6.7H0.3[Al10.2Si37.8O96] · 41H2O, Im-3m, a = 14.979(1) Å) from X-ray powder diffraction data by applying the Rietveld and the maximum entropy methods. Extra-framework Cs and Na cations are found in α-cavities facing eight- and six-membered rings and in the center of the double aromatic ring D8R.

The report given the results of the preparation of nanoparticles of nickel hydroxide by an electrochemical method, in distilled water and potassium hydroxide, using nickel electrodes. The novelty of the work lies in systematic studying of the preparation process of the preparation of nickel hydroxide nanoparticles by an electrochemical method. The particle size was determined by dynamic light scattering and X-ray diffraction analysis.

The crystalline phases formed in tungsten oxide (WO3 − x ) films upon isothermal step annealing in vacuum and air at various temperatures within 500–750°C have been studied. The films were deposited onto silica glass substrates by reactive dc magnetron sputtering. It is established that the observed thermochromism is related to the presence of an oxygen-deficient WO3 − x phase belonging to the hexagonal system, which is intensely formed as the annealing temperature increases from 650 to 750°C.

In the present work, the method of determining the energy band gap of oxide films is suggested based on the experimental transmission spectra in the fundamental absorption range. The use of the method is illustrated, taking as an example the investigation of the effect of technological deposition regimes on the physical properties of tungsten oxide films.

A series of mixed alkali-zinc diphosphates in the form of poly- and single crystals have been synthesized. Their physical-chemical, structural, and thermal characteristics have been determined. The compounds Na2ZnP2O7 and K2ZnP2O7 have a layered structural type, whereas LiNaZnP2O7, LiKZnP2O7, NaKZnP2O7, Li12Zn4(P2O7)(5), and K2Zn3(P2O7)(2) have a framework structural type.

The structure of a biologically active binuclear palladium complex, namely, [(1,10-phenanthroline) Pd(μ 2 -2-chloroethylammonium) 2 4+ · 4NO 3 − · H 2 O, has been determined using X-ray diffraction analysis. The compound crystallizes in the monoclinic system, space group of symmetry Cc , with the unit cell parameters a = 24.527(3) Å, b = 13.097(1) Å, c = 22.651(3) Å, β = 104.23(1)°, V = 7052(2) Å 3 , Z = 8, and ρ = 1.88 g/cm 3 . The final discrepancy factor is R 1 = 0.0316 for 15581 symmetrically nonequivalent reflections with I ≥ 2σ( I ), wR 2 = 0.0513, and GooF = 1.047. The palladium atoms reside in the oxidation state of 1+, which is rarely encountered in organometallic compounds. The asymmetric part of the unit cell contains two chemically equivalent but crystallographically independent positively charged binuclear palladium complexes, eight NO 3 − anions, and two water molecules. The π-π stacking interaction between the nearest 1,10-phenanthroline rings of the neighboring layers takes place. Moreover, the interlayer and intralayer interactions occur through electrostatic interaction forces and a complex three-dimensional system of hydrogen bonds, which are formed by water molecules and N 3 + groups.