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Рубинковская, Оксана Владимировна

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Оксана Владимировна

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Теперь показываю 1 - 10 из 26

Только метаданные
Electrophysical and Photo-Electrocatalytic Properties of MoS2 Nanofilms
(2020) Fominski, V. Y.; Nevolin, V. N.; Romanov, R. I.; Rubinkovskaya, O. V.; Fominski, D. V.; Soloviev, A. A.; Фоминский, Вячеслав Юрьевич; Неволин, Владимир Николаевич; Романов, Роман Иванович; Рубинковская, Оксана Владимировна; Фоминский, Дмитрий Вячеславович; Соловьев, Алексей
© 2020, Pleiades Publishing, Ltd.Abstract: MoS2 nanofilms were created by thermochemical processing (sulfurization) of thin-film Мо and МоОу precursors in S vapor. The precursor films were created by pulsed laser deposition. The obtained molybdenum disulfide films consisted of 2H-MoS2 nanocrystals with laminar packing of basal planes oriented perpendicular to the film surface. The increase in the sulfurization temperature from 500°C to 800°C provided better quality of local packing and, as a consequence, reduction of electric resistance, higher concentration of carriers (electrons) and their mobility. The application of metal oxide precursor МоОу resulted in higher efficiency of synthesis of high quality MoS2 nanofilms. The efficiency of activation of the electrochemical processes of hydrogen production in an acidic solution was lower with crystalline MoS2 nanofilms than with amorphous MoSx films. Nanocrystalline MoS2 films, however, manifested improved photo- and electrocatalytic characteristics in activation of reactions of hydrogen and oxygen evolution in an alkaline solution.
Только метаданные
The Effect of MoS x Nanocoatings on the Water Electrolysis Performance Using a Nickel-Foam-Based Bifunctional Catalyst
(2019) Novikov, S. M.; Komleva, O. V.; Fominski, D. V.; Romanov, R. I.; Fominski, V. Y.; Esin, M. I.; Рубинковская, Оксана Владимировна; Фоминский, Дмитрий Вячеславович; Романов, Роман Иванович; Фоминский, Вячеслав Юрьевич
© 2019, Pleiades Publishing, Ltd.The ability to increase the efficiency of electrochemical H2 and O2 evolution reactions in an alkaline solution using nickel-foam-based electrodes has been studied. To improve the catalytic properties of the foam, it was subjected to complex modification via sulfurizing in sulfur-containing gaseous media and the additional formation of amorphous or crystalline MoSx nanolayers. The foam was sulfidized in hydrogen sulfide or sulfur vapor at a temperature of 400°C. Amorphous MoSx films were produced via pulsed laser deposition from a MoS2 target in an H2S atmosphere. To obtain nanocrystalline catalytic MoSx layers, thin-film Mo precursors were preliminarily applied to the foam pre-sulfurized in sulfur vapor at 400°C. The deposition of precursors was carried out in vacuum at 22°C. After deposition, the foam with precursors was oxidized in air at 600°C. The modified samples were probed via scanning electron microscopy involving microanalysis and Raman spectroscopy. The effect of the precursor layer thickness on the sulfurizing efficiency and phase composition of the modified layers was established. The amorphous layer deposition was found to have a strong impact on only the O2 evolution. The crystalline layers obtained via sulfidizing of Mo-containing precursors exerted influence on both the cathodic and anodic reactions. The hydrogen overvoltage at a current density of 10 mA/cm2 was −160 mV, and the oxygen overvoltage was below 150 mV, which corresponded to the best electrocatalysts on the nickel foam after the volume modification via conventional chemical treatment (hydro- and solvothermal synthesis).
Только метаданные
Comparative studies of photoactivated H2 evolution for nano-needle WO3 films with crystalline 2H-WS2 and amorphous a-MoSx co-catalysts
(2021) Romanov, R. I.; Fominski, D. V.; Rubinkovskaya, O. V.; Soloviev, A. A.; Nevolin, V. N.; Fominski, V. Yu.; Романов, Роман Иванович; Фоминский, Дмитрий Вячеславович; Рубинковская, Оксана Владимировна; Соловьев, Алексей; Неволин, Владимир Николаевич; Фоминский, Вячеслав Юрьевич
© 2021 Institute of Physics Publishing. All rights reserved.(Photo)electrocatalytic properties of nanostructured WO3 films used for H2 evolution reaction (HER) were modified by forming hybrid structures containing a crystalline 2H-WS2 and an amorphous a-MoSx phases. For this, respectively, thermochemical treatment of metal oxide films in H2S gas and reaction pulsed laser deposition of molybdenum in H2S were applied. The functional characteristics of the hybrid structures were studied in a three-electrode electrochemical cell in an acid solution under intermittent illumination with a Xe lamp. a-MoSx film deposition caused a more significant improvement in the HER activity of MoSx/WO3 structure compared to that of WS2/WO3 structure. However, WS2/WO3 structures were superior to MoSx/WO3 structures in the efficiency of the photoactivated HER. The factors that could influence the (photo)electrocatalytic behaviour of the created structures were analysed.
Только метаданные
Study of the Mechanism of Photoactivated Hydrogen Evolution on a Silicon Photocathode with a-MoS x Thin-Film Catalyst
(2023) Rubinkovskaya, O. V.; Nevolin, V. N.; Fominski, D. V.; Romanov, R. I.; Kartsev, P. F.; Fominski, V. Y.; Рубинковская, Оксана Владимировна; Неволин, Владимир Николаевич; Фоминский, Дмитрий Вячеславович; Романов, Роман Иванович; Карцев, Петр Федорович; Фоминский, Вячеслав Юрьевич
Только метаданные
Optimization of MoSx Pulsed Laser Deposition of a Thin-Film Catalyst for an Efficient Hydrogen Evolution Reaction on a Silicon Photocathode
(2022) Fominski, D. V.; Vovchenko, V. D.; Rubinkovskaya, O. V.; Nevolin, V. N.; Fominskii, V. Yu.; Фоминский, Дмитрий Вячеславович; Вовченко, Евгений Дмитриевич; Рубинковская, Оксана Владимировна; Неволин, Владимир Николаевич; Фоминский, Вячеслав Юрьевич
Только метаданные
Nanostructured MoS3/WSe2 Thin-Film Photocathode for Efficient Water Splitting Under Light Illumination
(2021) Nevolin, V. N.; Romanov, R. I.; Fominski, D. V.; Rubinkovskaya, O. V.; Soloviev, A. A.; Fominski, V. Y.; Неволин, Владимир Николаевич; Романов, Роман Иванович; Фоминский, Дмитрий Вячеславович; Рубинковская, Оксана Владимировна; Соловьев, Алексей; Фоминский, Вячеслав Юрьевич
© 2021, Pleiades Publishing, Ltd.Abstract: The influence of the chemical state of a WOy thin-film precursor on formation of WSe2 nanofilms under rapid selenization on a glassy carbon substrate at 900°C is studied. A nanolayer of amorphous molybdenum sulfide (MoSx ~ 3), which has high catalytic activity in the electrochemical reaction of hydrogen evolution, is applied onto the surface of the obtained WSe2 films by pulsed laser deposition. It is shown that the composition of the WOy thin-film precursor has a significant effect on the morphology of the WSe2 nanolayers, and this characteristic largely determines the efficiency of hydrogen evolution by the MoS3/WSe2 heterostructure upon photoactivated water splitting. The most efficient hydrogen evolution is found for the MoS3/WSe2 photocathode heterostructure containing WSe2 in the form of crystal petals of ~50 nm in thickness, with these crystals oriented perpendicular to the substrate surface. A theoretical analysis of the possible effect of synergistic interaction at the MoS3/WSe2 interface on the efficiency of hydrogen evolution is carried out. Density functional theory calculations have shown that MoS3 clusters can increase the efficiency of the hydrogen evolution reaction upon contact with surface regions of WSe2 nanocrystals different in atomic packing.
Только метаданные
Формирование и исследование высокоэффективных нано-структурированных фото-электрокатализаторов расщепления воды на основе халькогенидов переходных металлов.
(2023) Рубинковская, О. В.; Рубинковская, Оксана Владимировна; Фоминский В.Ю.
Только метаданные
Features of the Application of Promising Catalysts from Amorphous Molybdenum Sulfide in the Creation of p-Si and pn-Si Photocathodes for the Production of Hydrogen in an Acidic Solution
(2024) Nevolin, V. N.; Rubinkovskaya, O. V.; Fominskii, D. V.; Romanov, R. I.; Fominskii, V. Y.; Неволин, Владимир Николаевич; Рубинковская, Оксана Владимировна; Фоминский, Дмитрий Вячеславович; Романов, Роман Иванович; Фоминский, Вячеслав Юрьевич
Только метаданные
Pulsed Laser Phosphorus Doping and Nanocomposite Catalysts Deposition in Forming a-MoSx/NP-Mo//n+p-Si Photocathodes for Efficient Solar Hydrogen Production
(2022) Fominski, V.; Demin, M.; Fominski, D.; Romanov, R.; Rubinkovskaya, O.; Shvets, P.; Goikhman, A.; Фоминский, Вячеслав Юрьевич; Фоминский, Дмитрий Вячеславович; Романов, Роман Иванович; Рубинковская, Оксана Владимировна
Pulsed laser deposition of nanostructured molybdenum sulfide films creates specific nonequilibrium growth conditions, which improve the electrocatalytic properties of the films in a hydrogen evolution reaction (HER). The enhanced catalytic performance of the amorphous a-MoSx (2 ≤ x ≤ 3) matrix is due to the synergistic effect of the Mo nanoparticles (Mo-NP) formed during the laser ablation of a MoS2 target. This work looks at the possibility of employing a-MoSx/NP-Mo films (4 and 20 nm thickness) to produce hydrogen by photo-stimulated HER using a p-Si cathode. A simple technique of pulsed laser p-Si doping with phosphorus was used to form an n+p-junction. Investigations of the energy band arrangement at the interface between a-MoSx/NP-Mo and n+-Si showed that the photo-HER on an a-MoSx/NP-Mo//n+p-Si photocathode with a 20 nm thick catalytic film proceeded according to a Z-scheme. The thickness of interfacial SiOy(P) nanolayer varied little in photo-HER without interfering with the effective electric current across the interface. The a-MoSx/NP-Mo//n+p-Si photocathode showed good long-term durability; its onset potential was 390 mV and photocurrent density was at 0 V was 28.7 mA/cm2. The a-MoSx/NP-Mo//n+p-Si photocathodes and their laser-based production technique offer a promising pathway toward sustainable solar hydrogen production. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Открытый доступ
Оптимизация режимов импульсного лазерного осаждения тонкопленочных катализаторов MOSX для эффективного выделения водорода на кремниевом фотокатоде
(2023) Фоминский, Д. В.; Романов, Р. И.; Рубинковская, О. В.; Неволин, В. Н.; Фоминский, В. Ю.; Неволин, Владимир Николаевич; Романов, Роман Иванович; Фоминский, Дмитрий Вячеславович; Фоминский, Вячеслав Юрьевич; Рубинковская, Оксана Владимировна
Исследована эффективность фото-активированного выделения водорода в кислотном растворе на катоде p-Si с нанесенной тонкой пленкой катализатора из аморфного сульфида молибдена. Установлено значительное влияние метода формирования пленки катализатора на качество фотокатода. Наибольшие фототоки обнаружены в случае нанесения каталитической пленки традиционным методом импульсного лазерного осаждения из мишени MoS2. Варьирование условий реакционного импульсного лазерного осаждения из мишени Мо в сероводороде не позволяло реализовать высокую эффективность получения водорода. Выявлены возможные причины различия функциональных характеристик созданных фотокатодов.