Персона:
Кузнецов, Виталий Владимирович

Организационные подразделения

Организационная единица

Институт общей профессиональной подготовки (ИОПП)

Миссией Института является: фундаментальная базовая подготовка студентов, необходимая для получения качественного образования на уровне требований международных стандартов; удовлетворение потребностей обучающихся в интеллектуальном, культурном, нравственном развитии и приобретении ими профессиональных знаний; формирование у студентов мотивации и умения учиться; профессиональная ориентация школьников и студентов в избранной области знаний, формирование способностей и навыков профессионального самоопределения и профессионального саморазвития. Основными целями и задачами Института являются: обеспечение высококачественной (фундаментальной) базовой подготовки студентов бакалавриата и специалитета; поддержка и развитие у студентов стремления к осознанному продолжению обучения в институтах (САЕ и др.) и на факультетах Университета; обеспечение преемственности образовательных программ общего среднего и высшего образования; обеспечение высокого качества довузовской подготовки учащихся Предуниверситария и школ-партнеров НИЯУ МИФИ за счет интеграции основного и дополнительного образования; учебно-методическое руководство общеобразовательными кафедрами Института, осуществляющими подготовку бакалавров и специалистов по социо-гуманитарным, общепрофессиональным и естественнонаучным дисциплинам, обеспечение единства требований к базовой подготовке студентов в рамках крупных научно-образовательных направлений (областей знаний).

Фамилия

Кузнецов

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Виталий Владимирович

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Теперь показываю 1 - 8 из 8

Только метаданные
Theoretical Analysis of Changes in the System’s Composition in the Course of Oxidative Electrolysis of Bromide Solution: pH Dependence
(2020) Petrov, M. M.; Konev, D. V.; Antipov, A. E.; Kartashova, N. V.; Kuznetsov, V. V.; Кузнецов, Виталий Владимирович
© 2020, Pleiades Publishing, Ltd.Changes in the indicator electrode potential (at zero current) E and (quasi) equilibrium composition of aqueous solution in the anode chamber of the model electrolyzer, which initially contained 0.5 M concentration of bromide anions, provided that the solution was kept at a constant pH and constant (together with the gas phase above it) total number of Br atoms in all its compounds, are calculated. Theoretical analysis was carried out for four different hypotheses regarding the possible extent of electrolysis and the nature of the processes are theoretically analyzed. They are: (1) no formation of bromine compounds with positive oxidation states occurs, i.e., electrolysis only leads to the formation of molecular bromine in its various forms (the dissolved state of Br2, as well as phases of liquid bromine B22liq and bromine vapor in the gas space above the B22vap solution); (2) oxidation of bromide ions leads to the formation of bromine compounds in its oxidation state up to +1 inclusive; (3) the process proceeds with the formation of both bromate ion (BrO3 -) and compounds of bromine with lower oxidation states in solution (Br3-, Br5- Br2,B22liq,B22vap, BrO -, HBrO); (4) in addition to the components specified in clause (3), the formation of the perbromate anion (BrO4 -) is also taken into consideration. All electrochemical and chemical reactions involving bromine-containing species have been taken into consideration in the hypothesis framework of the system’s evolution (1), (2), (3), or (4), are assumed to be in a (quasi)equilibrium state. Predictions for all hypotheses (1), (2), (3), or (4) have been compared at three different pH values of the solution (2, 6 and 10 of Br-containing anolyte composition’s evolution in the course of electrolysis.
Только метаданные
Hydrogen Evolution Reaction Electrocatalysts Based on Electrolytic and Chemical-Catalytic Alloys of Rhenium and Nickel
(2020) Gamburg, Y. D.; Krutskikh, V. M.; Zhulikov, V. V.; Filatova, E. A.; Kuznetsov, V. V.; Кузнецов, Виталий Владимирович
© 2020, Pleiades Publishing, Ltd.Abstract: The composition, structure, and electrocatalytic properties in HER are compared for Re–Ni electrodeposits and Ni–Re–P alloys synthesized by chemical-catalytic deposition with the use of sodium hypophosphite as the reducer. The coordination numbers of nickel and rhenium and the interatomic distances of synthesized materials are determined by EXAFS and XANES methods. It is shown that the structure of Re‒Ni catalysts with the highest catalytic activity lacks the far order as regards the position of rhenium and nickel atoms, which allows assuming that these electrode materials are in the amorphous state. For chemical-catalytic Ni–Re–P coatings, it is shown that the introduction of rhenium into their composition lowers down the phosphorus content in the alloy formed. The chemical-catalytic Ni–Re–P coatings show promise as the HER catalysts in acid solutions.
Только метаданные
The Use of Galvanic Displacement for Synthesizing Pt/Carbide (Mo2C, ZrC, NbC) Catalysts Highly Active in the Hydrogen Evolution Reaction
(2022) Kuznetsov, V. V.; Podlovchenko, B. I.; Frolov, K. V.; Volkov, M. A.; Khanin, D. A.; Кузнецов, Виталий Владимирович
Только метаданные
Synthesis and characterization of Pt-HxMoO3 catalysts for CO-tolerant PEMFCs
(2022) Kurdin, K. A.; Sinitsyn, V. V.; Galitskaya, E. A.; Filatova, E. A.; Kuznetsov, V. V.; Кузнецов, Виталий Владимирович
© 2020 Elsevier B.V.Two relatively simple synthetic procedures were developed for the synthesis of Pt–HxMoO3 composites. The obtained materials may be of interest as CO-tolerant catalysts for hydrogen-air fuel cells with proton-exchange membranes (PEMFCs). The first step of both syntheses was to prepare hydrogen molybdenum bronzes (HxMoO3) through the addition of Zn powder to acidic solutions containing Mo(VI) species. Two types of hydrogen-containing molybdenum bronzes were synthesized, namely, red bronze (x≈1.55) and green bronze (x≈2.0). The next step was the Pt deposition in a redox reaction between HxMoO3 and potassium tetrachloroplatinate (K2PtCl4) under open-circuit conditions that resulted in composite materials defined by aPt⋅b(HxMoO3). Numerous physical methods, including XRD, STEM, SEM, and XPS, were used to determine both the composition and structure of the catalysts. Platinum clusters were distributed over the surface of catalytically active support (HxMoO3) in both cases; however, the type of molybdenum bronze used for synthesis affects the size of Pt particles. Linear sweep voltammetry (LSV) was used to determine the regularities of both adsorbed carbon monoxide electrodesorption and dissolved CO electrooxidation. CO-tolerance of prepared composites was estimated using H2/100 ppm CO mixture under conditions of both an electrochemical cell and a membrane electrode assembly (MEA). The results of this work are promising, as they provide a relatively simple method for the synthesis of CO-tolerant catalysts. The understanding of the origin of the CO-tolerance is essential for the development of electrode materials that could be used in the real fuel cells.
Только метаданные
Electrolytic PdMo deposits with high corrosion resistance in relation to palladium
(2020) Telezhkina, A. V.; Podlovchenko, B. I.; Kuznetsov, V. V.; Кузнецов, Виталий Владимирович
© 2020The PdMo (∼20 at% Mo) deposits obtained by electrodeposition from acetate solutions containing a palladium salt and ammonium heptamolybdate on the surface of a glassy carbon electrode demonstrated low palladium solubility at high anodic potentials.
Только метаданные
Electroreduction of pertechnetate ions in concentrated acetate solutions
(2020) Volkov, M. A.; German, K. E.; Filatova, E. A.; Belyakova, O. A.; Kuznetsov, V. V.; Кузнецов, Виталий Владимирович
© 2020 Elsevier B.V.Electrochemical reduction of pertechnetate ions is studied in acetate solutions on both mercury dropping and solid electrodes. It is found that electroreduction of TcO4 − ions on the mercury dropping electrode occurs stepwise via the following route Tc(VII) → Tc(IV) → Tc(III) → Tc(0). Ammonium ions affect the reduction of pertechnetate ions by shifting potentials of polarographic waves in a positive direction. Diffusion coefficients of Tc(VII) species in acetate solutions decreased from ~1 · 10−5 cm2 s−1 in a solution containing 2 mol dm−3 acetate ions to ~1.2 · 10−6 cm2 s−1 in a solution containing 8 mol dm−3 acetate ions. The Stokes radius of pertechnetate ion is 0.19 ± 0.01 nm. Technetium coatings were characterized using X-ray absorption spectroscopy (XANES/EXAFS). It is shown that technetium is in the metallic state in the electrolytic deposits; however, the obtained metal is amorphous. The Tc-Tc interatomic distances and coordination numbers of Tc atoms in the deposits are determined. The distance between technetium atoms in the electrodeposits is slightly less (0.262 nm) compared to technetium foil (0.272 nm).
Только метаданные
An effective electrochemical destruction of non-ionic surfactants on bismuth-modified lead dioxide anodes for wastewater pretreatment
(2020) Kuznetsov, V. V.; Kapustin, E. S.; Pirogov, A. V.; Kurdin, K. A.; Кузнецов, Виталий Владимирович
Non-ionic surfactants are permanent components of wastewater of various origins, and their removal is necessary for sewage treatment. A new method of electrochemical treatment of wastewater for non-ionic surfactant destruction has been proposed. Effective destruction of both alkoxylated and phenoxylated non-ionic surfactants was performed using beta-Pb1-xBixO2-0.5x anodes prepared by electrodeposition. The method proposed is based on the generation of active oxygen-containing species (e.g., OH center dot, HO2 center dot) at the anode followed by chemical interaction between these radicals and organic molecules, which results in the destruction of pollutants. Oxide materials obtained by electrodeposition contained similar to 4.5 % of bismuth and have the beta-PbO2 lattice. The insertion of bismuth into the composition of lead dioxide prepared by electrodeposition resulted in an increase in their specific surface area from 0.66 to 2.5 m(2) g(-1). Modification of beta-PbO2 by bismuth led to the shift of oxygen evolution potentials toward more positive values. Effective electrooxidation of non-ionic surfactants was achieved in the solutions exposed to electrochemical treatment. There were no accumulations of metabolites in the solutions during electrolysis. Chemical oxygen demand decreased from 80 to 5 mg O-2 dm(-3), and total organic carbon (TOC) decreased from 24 to 1.5 ppm during 1 h of the electrochemical treatment. The electrode material was stable under electrolysis conditions. No accumulation of both lead and bismuth species in the solution under electrochemical treatment was found.
Только метаданные
Electrodeposited NiMo, CoMo, ReNi, and electroless NiReP alloys as cathode materials for hydrogen evolution reaction
(2020) Gamburg, Y.; Zhulikov, V. V.; Krutskikh, V. M.; Filatova, E. A.; Kuznetsov, V. V.; Кузнецов, Виталий Владимирович
© 2020 Elsevier LtdKinetics of hydrogen evolution reaction (HER) is studied on nickel and cobalt-containing electrocatalysts. CoMo, NiMo, and ReNi alloys are obtained by electrodeposition, while NiReP catalysts are prepared by electroless deposition under open-circuit conditions using hypophosphite ions as a reducing agent. The prepared materials are characterized by a complex of modern physical methods; namely, SEM, XPS, XRD, and X-ray absorption spectroscopy. No long-range order was found for all electrodeposited alloys whereas NiReP alloys prepared by electroless deposition contain nickel phosphides. A certain amount of molybdenum or rhenium in the CoMo and ReNi alloys is in the oxidized states. CoMo and ReNi coatings contain 15–20 at. % of oxygen in the form of O2−. Molybdenum containing alloys are unstable in the alkaline solutions under electrolysis conditions. In opposite, NiRe electrodeposits are promising candidates for hydrogen evolution catalysis in alkaline solutions due to their high catalytic activity and stability under electrolysis conditions. NiReP alloys can be used for HER catalysis in acidic solutions.