Персона: Фоминский, Дмитрий Вячеславович
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Дмитрий Вячеславович
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- ПубликацияТолько метаданныеFormation 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.
- ПубликацияОткрытый доступРАЗЛЕТ ЛАЗЕРНОЙ ПЛАЗМЫ В СЕРОВОДОРОДЕ И ФОРМИРОВАНИЕ ТОНКОПЛЕНОЧНЫХ ПОКРЫТИЙ a-С(S, H) С КАЧЕСТВЕННЫМИ АНТИФРИКЦИОННЫМИ СВОЙСТВАМИ(НИЯУ МИФИ, 2021) Грицкевич, М. Д.; Фоминский, Д. В.; Романов, Р. И.; Фоминский, В. Ю.; Фоминский, Вячеслав Юрьевич; Фоминский, Дмитрий Вячеславович; Грицкевич, Мария Дмитриевна; Романов, Роман ИвановичThe effect of reactive pulsed laser deposition of carbon on the tribological properties of the surface of steel materials was investigated. The influence of H2S pressure on the chemical state and composition of a-C(S,H) film was investigated. For the optimal pressure, the obtained coatings have high wear resistance and low coefficient of friction.
- ПубликацияТолько метаданныеPulsed laser deposition of nanostructured MoS3/np-Mo//WO3-y hybrid catalyst for enhanced (Photo) electrochemical hydrogen evolution(2019) Gnedovets, A.; Novikov, S.; Fominskii, V.; Fominski, D.; Romanov, R.; Kartsev, P.; Rubinkovskaya, O.; Фоминский, Вячеслав Юрьевич; Фоминский, Дмитрий Вячеславович; Романов, Роман Иванович; Карцев, Петр Федорович; Рубинковская, Оксана Владимировна© 2019 by the authors. Licensee MDPI, Basel, Switzerland.Pulsed laser ablation of MoS2 and WO3 targets at appropriate pressures of background gas (Ar, air) were used for the preparation of new hybrid nanostructured catalytic films for hydrogen production in an acid solution. The films consisted of a nanostructured WO3-y underlayer that was covered with composite MoS3/np-Mo nanocatalyst. The use of dry air with pressures of 40 and 80 Pa allowed the formation of porous WO3-y films with cauliflower- and web-like morphology, respectively. The ablation of the MoS2 target in Ar gas at a pressure of 16 Pa resulted in the formation of amorphousMoS3films and spherical Mo nanoparticles. The hybrid MoS3/np-Mo//WO3-y films deposited on transparent conducting substrates possessed the enhanced (photo)electrocatalytic performance in comparison with that of any pristine one (MoS3/np-Mo or WO3-y films) with the same loading. Modeling by the kinetic Monte Carlo method indicated that the change in morphology of the deposited WO3-y films could be caused by the transition of ballistic deposition to diffusion limited aggregation of structural units (atoms/clusters) under background gas pressure growth. The factors and mechanisms contributing to the enhancement of the electrocatalytic activity of hybrid nanostructured films and facilitating the effective photo-activation of hydrogen evolution in these films are considered.
- ПубликацияОткрытый доступСПОСОБ СОЗДАНИЯ ФОТОКАТОДА ДЛЯ ПОЛУЧЕНИЯ ВОДОРОДА(НИЯУ МИФИ, 2023) Соловьев, А.; Романов, Р. И.; Фоминский, В. Ю.; Фоминский, Д. В.; Грицкевич, М. Д.; Степанова, Т. В.; Степанова, Татьяна Владимировна; Фоминский, Вячеслав Юрьевич; Романов, Роман Иванович; Грицкевич, Мария Дмитриевна; Фоминский, Дмитрий Вячеславович; Соловьев, АлексейИзобретение относится к области водородной энергетики, а именно к созданию эффективных тонкопленочных фотокатодов для электрохимической, в особенности фотоактивированной реакции расщепления воды и получения водорода. Технический результат - повышение адгезионных свойств фотокаталитического слоя к подложке и коррозионной стойкости к электролиту, а также стабильности характеристик фотокатода. Способ создания фотокатода для получения водорода включает в себя размещение подложки из стеклоуглерода в вакуумной камере, создание вакуума, нагрев подложки, нанесение на подложку пленки WO3 методом импульсного лазерного осаждения путем лазерной абляции металлической вольфрамовой мишени, охлаждение подложки, напуск в вакуумную камеру серосодержащего газа, нагрев подложки до температур 300-500°C с последующим сульфидированием. 3 ил.
- ПубликацияТолько метаданныеThe 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).
- ПубликацияТолько метаданныеNanostructured 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.
- ПубликацияТолько метаданныеComparative 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.
- ПубликацияОткрытый доступВлияние интерфейсных пленок Ni и Ti на антифрикционные свойства нанослоистых тонкопленочных покрытий WS2/G-C(2023) Романов, Р. И.; Фоминский, Д. В.; Касьяненко, В. А.; Грицкевич, М. Д.; Фоминский, В. Ю.; Грицкевич, Мария Дмитриевна; Фоминский, Дмитрий Вячеславович; Романов, Роман Иванович; Фоминский, Вячеслав ЮрьевичМетодом реакционного импульсного лазерного осаждения созданы модельные тонкопленочные покрытия, содержащие ламинарные пленки WS2 и пленки углерода нанометровой толщины. Для активирования роста графитоподобного состояния, пленки углерода (g-C) осаждались на поверхность пленок никеля или титана, формируемых между слоями WS2 и g-C.Обнаружена склонность покрытия WS2/Ni/g-C/WS2 к проявлению очень низкого коэффициента трения (менее 0.013) при испытаниях в сухом воздухе без смазки. Покрытие с титановой интерфейсной пленкой такими свойствами не обладало. Структурное состояние покрытия до и после трибоиспытания контролировалось методом микрорамановской спектроскопии (МРС). Выявлены возможные причины различного поведения покрытий с выбранными металлическими пленками-катализаторами.
- ПубликацияТолько метаданныеChemical 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
- ПубликацияТолько метаданныеPulsed 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 ВладимировнаPulsed 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.