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Рубинковская, Оксана Владимировна

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Теперь показываю 1 - 10 из 27

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
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
Chemical Properties and Electronic Structure of Molybdenum Oxysulfide Films for Advanced Photoelectrocatalysts for Hydrogen Production
(2022) Nevolin, V. N.; Romanov, R. I.; Fominski, D. V.; Rubinkovskaya, O. V.; Fominski, V. Y.; Неволин, Владимир Николаевич; Романов, Роман Иванович; Фоминский, Дмитрий Вячеславович; Рубинковская, Оксана Владимировна; Фоминский, Вячеслав Юрьевич
Только метаданные
Formation of Effective Electrocatalysts of Hydrogen Evolution MoSx > 2 by Pulsed Laser Ablation Assisted by the Deposition of Mo Nanoparticles
(2020) Golubkov, G. V.; Fominski, D. V.; Nevolin, V. N.; Fominski, V. Y.; Romanov, R. I.; Komleva, O. V.; Kartsev, P. F.; Фоминский, Дмитрий Вячеславович; Неволин, Владимир Николаевич; Фоминский, Вячеслав Юрьевич; Романов, Роман Иванович; Рубинковская, Оксана Владимировна; Карцев, Петр Федорович
© 2020, Pleiades Publishing, Ltd.Abstract: The mechanisms of film formation during pulsed laser ablation of a MoS2 target were studied. The conditions for the deposition of laser erosion plume were determined. This made it possible to obtain coatings with a porous structure consisting of round Mo nanoparticles coated with a thin shell of amorphous molybdenum sulfide MoSx > 2. Due to its hybrid structure, the MoSx > 2/Mo nanomaterial can be effectively used for electro- and photocatalysis of water splitting. The MoSx> 2/Mo films deposited on a glassy carbon substrate are characterized by good current transport and high active surface area. When the film thickness increased due to the increased deposition time, the overvoltage of hydrogen evolution in an acid solution monotonically decreased to 142.5 mV, which was necessary in order to obtain current density of hydrogen evolution of 10 mA/cm2. The catalyst loading was 230 μg/cm2. Further increase in the loading did not significantly reduce the overvoltage. The results indicate that it is promising to use Mo nanoparticles as an ultrafine support for the catalytic nanolayers of amorphous molybdenum sulfide.
Только метаданные
Surface Physicochemical Treatment of Nickel Foam for Increasing Its Electrocatalytic Activity in Overall Water Splitting
(2020) Fominski, D. V.; Nevolin, V. N.; Romanov, R. I.; Fominski, V. Y.; Komleva, O. V.; Kartsev, P. F.; Novikov, S. M.; Фоминский, Дмитрий Вячеславович; Неволин, Владимир Николаевич; Романов, Роман Иванович; Фоминский, Вячеслав Юрьевич; Рубинковская, Оксана Владимировна; Карцев, Петр Федорович
© 2020, Pleiades Publishing, Ltd.Abstract: The possibility of using physicochemical methods for treating a nickel foam to increase its electrocatalytic activity in hydrogen and oxygen evolution reactions in an aqueous alkaline solution was studied. The modification of a 1-mm-thick sheet of the foam was carried out through its surface and included physical deposition of pulsed laser plasma for the formation of catalytic MoSx and MoSxSey films, followed by their annealing. The effect of foam pretreatment by sulfurization in H2S under varying conditions and formation of catalytic layers with different structures and compositions was studied. The best improvement in the electrocatalytic performance of the foam was exerted by thin-film coatings of molybdenum sulfide and sulfide/selenide with a nanocrystalline structure formed on the surface of a foam with a Ni3S2 underlayer. The possibility of a synergetic effect of the formed phases was analyzed by DFT calculations. For the optimum composition of the modified layers, the overvoltage of H2 evolution (for a current density of 10 mA/cm2) decreased to 155 mV, and the overvoltage of O2 evolution did not exceed 160 mV. The electrocatalytic characteristics obtained by this treatment are not inferior to those for the best modern electrocatalysts created on nickel foam by widely used methods of hydrothermal synthesis or electrodeposition.
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.
Открытый доступ
DFT-АНАЛИЗ ВЗАИМОДЕЙСТВИЯ НАНОФАЗ В КАТАЛИЗАТОРЕ ВОДОРОДА НА ОСНОВЕ MoSx
(НИЯУ МИФИ, 2025) РУБИНКОВСКАЯ, О. В.; ФОМИНСКИЙ, Д. В.; РОМАНОВ, Р. И.; ФОМИНСКИЙ, В. Ю.; Фоминский, Вячеслав Юрьевич; Романов, Роман Иванович; Фоминский, Дмитрий Вячеславович; Рубинковская, Оксана Владимировна
Проведен анализ эффектов взаимодействия нанофаз в катализаторе водорода на основе MoSx с различными гетеропереходами. Использован метод функционала плотности (DFT) для определения энергетических и каталитических характеристик поверхностей данных гетероструктур. Показано, что химическое состояние и взаимное расположение энергетических зон гетеропереходов MoSx с различными фазами существенно влияют на эффективность разделения фотогенерированных носителей заряда. Исследования показали, что образование гетеропереходов между фазами MoSx и другими материалами существенно влияет на электронные свойства катализатора, такие как уровень Ферми и плотность состояний.
Только метаданные
Thin Nanostructured n-WSe2 Films and Their Application in Semiconductor p-Si Photocathodes for Hydrogen Production by Water Splitting
(2023) Rubinkovskaya, O. V.; Fominskii, D. V.; Nevolin, V. N.; Romanov, R. I.; Kartsev, P. F.; Fominskii, V. Y.; Рубинковская, Оксана Владимировна; Фоминский, Дмитрий Вячеславович; Неволин, Владимир Николаевич; Романов, Роман Иванович; Карцев, Петр Федорович; Фоминский, Вячеслав Юрьевич