Vlasenko, N. V. Kyriienko, P. I. Valihura, K. V. Yanushevska, O. I. Soloviev, S. O. Strizhak, P. E.
Published in
Theoretical and Experimental Chemistry
It was established that modifying additives CeO2, SiO2, and H3PO4 change the catalytic properties of compositions based on ZrO2 in the conversion of ethanol into 1-butanol due to a change in the phase composition of ZrO2, which determines its acid–base properties. As a result of stabilization of the tetragonal ZrO2 phase with additions of CeO2 and ...
Gurtovyi, R. I. Ishchenko, A. A. Lampeka, Ya. D.
Published in
Theoretical and Experimental Chemistry
New composite materials derived from a porous luminescent zinc-containing coordination polymer and organic dyes, namely, 5-(4-diethylamino)benzylidene)pyrimidine-2,4,6(1H,3H,5H)-trione (KR) and methylene blue (MB) have been prepared. Upon excitation of the polymer matrix, the composite with KR was shown to display dual luminescence attributed to en...
Kurmach, M. M. Popovych, N. O. Kyriienko, P. I. Yaremov, P. S. Khyzhun, O. Y. Andreev, O. V. Shvets, O. V.
Published in
Theoretical and Experimental Chemistry
Hierarchical SnAl-silicate zeolites of the BEA structural type with Lewis (up to 130 μmol/g) and Brønsted (up to 330 μmol/g) acid sites, the concentration of which according to diffuse reflectance and X-ray photoelectron spectroscopy increases with increase of the charge of the hydrophilic part of the employed templates and also the Al3+ and Sn4+ c...
Aniskevich, Y. M. Malashchonak, M. V. Bakavets, A. S. Ragoisha, G. A. Streltsov, E. A.
Published in
Theoretical and Experimental Chemistry
Electrochemical deposition of an atomic layer of Pb (underpotential deposition (upd)) was used to determine the electrochemically active surface area of PbSe and Bi2Te3 films obtained under various electrodeposition conditions. The investigations were carried out by cyclic voltammetry and scanning electron microscopy. It was shown that underpotenti...
Opeida, I. A. Sheparovych, R. B.
Published in
Theoretical and Experimental Chemistry
Inhibition by hydrogen peroxide in the radical chain aerobic oxidation of alkylarenes is reported. A kinetic scheme for this process and an equation describing the oxidation kinetics of an alkylarene in the presence of HOOH are presented. The inhibitory effect of H2O2 was found to decrease with increasing rate constant of the chain termination step...
Pyatnitsky, Y. I. Dolgikh, L. Yu. Senchilo, L. M. Staraya, L. A. Strizhak, P. E.
Published in
Theoretical and Experimental Chemistry
On the basis of analysis and thermodynamic calculations of the reaction paths of the catalytic conversion of ethanol a two-step process is proposed for the production of propylene from bioethanol and catalysts for its implementation. The catalyst of the first step is used to convert the ethanol into acetone, and the catalyst of the second step is u...
Ovcharov, M. L. Mishura, A. M. Shvalagin, V. V. Granchak, V. M.
Published in
Theoretical and Experimental Chemistry
A summary and analysis are offered for the data available in the literature as well as the results of our own research on photocatalytic reduction processes on various semiconductor catalysts. A number of approaches are examined for the improvement of semiconductor catalysts, in particular, through alteration of morphology, increasing the amount of...
Pariiska, O. O. Mazur, D. O. Kurys, Ya. I. Koshechko, V. G. Pokhodenko, V. D.
Published in
Theoretical and Experimental Chemistry
The use of a mixture of m-phenylenediamine and ammonium persulfate instead of previously prepared poly-m-phenylenediamine as nitrogen source permits us to simplify the formation of pyrolyzed Co-N-C electrocatalysts for the reduction of oxygen and leads to greater activity of these electrocatalysts in acid electrolytes due to the presence of Co9S8. ...
Snurnikova, O. V. Gulida, A. V. Korovin, A. Yu. Rusakova, N. V. Ivanov, Yu. E. Yavolovskii, A. A. Kamalov, G. L.
Published in
Theoretical and Experimental Chemistry
It was established that unsubstituted amides of imidazole-4,5-dicarboxylic acid are characterized by large (up to 15000 cm–1) Stokes shifts. It was found that the structural factors determining the character of transitions of the molecules of esters and hydrazides in the initial and excited states are similar. The effect of the lipophilicity of the...
Aimukhanov, A. K. Ibrayev, N. Kh. Ishchenko, A. A. Kulinich, A. V.
Published in
Theoretical and Experimental Chemistry
An increase in the concentration of silver nanoparticles (NP) initially causes an increase and then a decrease in the absorption and fluorescence intensities of a solution of tetramethinemerocyanine dye derived from indole and thiobarbituric acid. In the case of gold NP, the dye absorption remains unchanged, while fluorescence is reduced. The lifet...
