Reactive Pulsed Laser Deposition of Clustered-Type MoSx (x ~ 2, 3, and 4) Films and Their Solid Lubricant Properties at Low Temperature

Fominski, V. Yu.; Демин, М. В.; Nevolin, V. N.; Fominski, D. V.; Романов, Р. И.; Gritskevich, M. D.; Smirnov, N. I.

doi:10.3390/nano10040653

Cited by 39 publications

(41 citation statements)

References 54 publications

(104 reference statements)

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“…Overall, these coatings outperformed MoS 2 and MoS 3 monophase coatings in their tribological characteristics when tested in dry friction conditions at room and low (−100 • C) temperatures. In humid air at room temperature, the Mo-S-C-H coatings did not show a noticeable improvement of low friction properties in comparison with the MoS 2 and MoS 3 monophase coatings previously obtained by RPLD and studied in [35].…”

Section: Introductioncontrasting

confidence: 57%

“…Broad peaks at 350 and 402 cm −1 indicated the formation of the MoS 2 nanophase with a disordered atomic packing. The appearance in the spectrum of the Mo-S-C-H_9 coating of weak-intensity and broad peaks at~200 and~500 cm −1 suggested that, along with the MoS x nanophase, [35,[43][44][45]. In the Raman spectrum for the Mo-S-C-H_18 coating, the Mo 3 -S clusters corresponded to peaks at the following vibration modes: ν(Mo-Mo) at 210 cm −1 , ν(Mo-S) coupled at~330 cm −1 , ν(Mo-S apical ) at~450 cm −1 , ν(S-S) terminal at~520 cm −1 , and ν(S-S) bridging at 550 cm −1 .…”

Section: Morphology Structure and Chemical State Of Mo-s-c-h Films mentioning

confidence: 99%

“…A doublet with a low binding energy (the binding energy of the S 2p 3/2 peak does not exceed 162.3 eV, and the S 2p 1/2 -163.5 eV) usually corresponds to the S 2− species characteristic of the MoS x compound [35,58]. A doublet with a high binding energy (the binding energy of the S 2p 3/2 peak is~162.8 ÷ 163.4.4 eV) corresponds to the S 2 2 -species, which are characteristic of MoS x compounds, where clusters of Mo-S 3 and/or Mo 3 -S are formed due to a high concentration of sulphur (х > 2), [35,43,52,53]. S atoms in the chemical bond with C atoms (-S-C-S-) correspond to the doublet S S 2p 3/2 -S 2p 1/2 , in which the binding energy of the S 2p 3/2 peak is 163.6 eV, and the S 2p 1/2 peak equals 165.2 eV [57].…”

Section: Morphology Structure and Chemical State Of Mo-s-c-h Films mentioning

confidence: 99%

“…The aim of this work is to study the composition, structure, and tribological properties of Mo–S–C–H thin-film coatings formed by reactive PLD (RPLD) on steel substrates at room temperature. Reactive PLD makes it possible to form smoother and more uniform layers of a molybdenum sulphide MoS x and alter the ratio of elements x = Mo/S over a wide range (1 ≤ х ≤ 4) [ 35 ]. Varying the composition of the coatings has proven to be an important factor for the development of their specific applications.…”

Section: Introductionmentioning

confidence: 99%

“…During the RPLD of a Mo–S–C–H nanocomposite coating from a target containing sectors of pure molybdenum and graphite, the deposition of a pulsed laser plume occurs in a reactive medium—hydrogen sulphide (H 2 S). Fominski et al [ 35 ] revealed the dependence of the composition of solid lubricate MoS x thin-film coatings on the pressure of H 2 S. The influence of H 2 S on the composition and properties of carbon thin films obtained by RPLD remains unexplored, which creates difficulties in choosing optimal conditions for obtaining high-quality nanocomposite coatings Mo–S–C–H.…”

Section: Introductionmentioning

confidence: 99%

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Specific Features of Reactive Pulsed Laser Deposition of Solid Lubricating Nanocomposite Mo–S–C–H Thin-Film Coatings

Fominski

Романов

et al. 2020

Nanomaterials

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This work investigates the structure and chemical states of thin-film coatings obtained by pulsed laser codeposition of Mo and C in a reactive gas (H2S). The coatings were analysed for their prospective use as solid lubricating coatings for friction units operating in extreme conditions. Pulsed laser ablation of molybdenum and graphite targets was accompanied by the effective interaction of the deposited Mo and C layers with the reactive gas and the chemical states of Mo- and C-containing nanophases were interdependent. This had a negative effect on the tribological properties of Mo–S–C–H nanocomposite coatings obtained at H2S pressures of 9 and 18 Pa, which were optimal for obtaining MoS2 and MoS3 coatings, respectively. The best tribological properties were found for the Mo–S–C–H_5.5 coating formed at an H2S pressure of 5.5 Pa. At this pressure, the x = S/Mo ratio in the MoSx nanophase was slightly less than 2, and the a-C(S,H) nanophase contained ~8 at.% S and ~16 at.% H. The a-C(S,H) nanophase with this composition provided a low coefficient of friction (~0.03) at low ambient humidity and 22 °C. The nanophase composition in Mo–S–C–H_5.5 coating demonstrated fairly good antifriction properties and increased wear resistance even at −100 °C. For wet friction conditions, Mo–S–C–H nanocomposite coatings did not have significant advantages in reducing friction compared to the MoS2 and MoS3 coatings formed by reactive pulsed laser deposition.

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Section: Introductioncontrasting

confidence: 57%

Section: Morphology Structure and Chemical State Of Mo-s-c-h Films mentioning

confidence: 99%

Section: Morphology Structure and Chemical State Of Mo-s-c-h Films mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Specific Features of Reactive Pulsed Laser Deposition of Solid Lubricating Nanocomposite Mo–S–C–H Thin-Film Coatings

Fominski

Романов

et al. 2020

Nanomaterials

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MoS₂ Nanosheets Uniformly Anchored on NiMoO₄ Nanorods, a Highly Active Hierarchical Nanostructure Catalyst for Oxygen Evolution Reaction and Pseudo‐Capacitors

Solomon

Kohan

Mazzaro

et al. 2022

Advanced Sustainable Systems

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standard of electrolysis, such criteria are critical and still challenging. For energy storage devices, such as supercapacitors, an active catalyst capable of providing high power density and superior cycle life is a necessary condition. Pseudo capacitors exhibit very high-power density similar to that of double-layer capacitor devices. However, they differ from a double-layer capacitor because of their battery-like redox processes of the charge storage principles. Transition metal oxides (TMOs) such as NiCo 2 O 4 @NiMoO 4 , [6] NiCo-S (Fe-NiCo-S), [7] CoMxP/CC (M = Fe, Mn, and Ni), [8] and NiCoFe-P [9] have been employed as active electrocatalysts for OER and supercapacitors. Pseudocapacitive-type nanomaterials, especially TMOs or hydroxides, such as nickel oxide (NiO), [10,11] NiMoO 4 @Co (OH) 2 , [12] are widely investigated as candidates for supercapacitor applications due to their various oxidation states that contribute to the pseudo capacitance properties.Hierarchical-structured catalysts have attracted considerable attention in the field of materials for renewable energy applications. These structures can effectively increase the active surface area owing to their morphology. We recently reported the catalytic efficiency of hydrated core NiMoO 4 and shell Co 3 O 4 Hierarchical nanostructures have attracted considerable research attention due to their applications in the catalysis field. Herein, we design a versatile hierarchical nanostructure composed of NiMoO 4 nanorods surrounded by active MoS 2 nanosheets on an interconnected nickel foam substrate. The as-prepared nanostructure exhibits excellent oxygen evolution reaction performance, producing a current density of 10 mA cm −2 at an overpotential of 90 mV, in comparison with 220 mV necessary to reach a similar current density for NiMoO 4 . This behavior originates from the structural/morphological properties of the MoS 2 nanosheets, which present numerous surface-active sites and allow good contact with the electrolyte. Besides, the structures can effectively store charges, due to their unique branched network providing accessible active surface area, which facilitates intermediates adsorptions. Particularly, NiMoO 4 /MoS 2 shows a charge capacity of 358 mAhg −1 at a current of 0.5 A g −1 (230 mAhg −1 for NiMoO 4 ), thus suggesting promising applications for charge-storing devices.

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[Mo₂S₁₂]²⁻ Complex as a Precursor for In‐situ Generation of Molybdenum Sulfide Catalyst During the H₂ Evolution

Dat

Nguyen

et al. 2023

Chemistry An Asian Journal

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For decades, the sulfido molybdenum complexes like [MoS 4 ] 2À , [Mo 2 S 12 ] 2À , [Mo 3 S 13 ] 2À have gained great attention because of their chemical versatility as well as their structural similarity to the edge-plan of the molybdenum disulfide (MoS 2 ) which shows promising catalytic ability for the H 2 generation. In this work, we report on the investigation of the dinuclear complex [Mo 2 S 12 ] 2À in both organic and aqueous solution. We demonstrate that [Mo 2 S 12 ] 2À is not intact during the H 2 evolution catalysis when it is assayed as a homogeneous catalyst in an electrolyte solution (e. g. in DMF or water solvent) nor when it is immobilized on an electrode surface (e. g. mesoporous carbon black). It transforms into the polymeric amorphous molybdenum sulfide [MoS] which subsequently acts as an actual catalyst. We discuss on the possible [Mo 2 S 12 ] 2À to [MoS] transformation mechanism by employing an arsenal of electrochemical analysis, spectroscopic analyses and microscopic analyses. Effects of the electrochemical operating conditions to the [Mo 2 S 12 ] 2À to [MoS] transformation as well as to the chemical nature and the catalytic performance of the [MoS] product are also emphasized.

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Reactive Pulsed Laser Deposition of Clustered-Type MoSx (x ~ 2, 3, and 4) Films and Their Solid Lubricant Properties at Low Temperature

Cited by 39 publications

References 54 publications

Specific Features of Reactive Pulsed Laser Deposition of Solid Lubricating Nanocomposite Mo–S–C–H Thin-Film Coatings

Specific Features of Reactive Pulsed Laser Deposition of Solid Lubricating Nanocomposite Mo–S–C–H Thin-Film Coatings

MoS₂ Nanosheets Uniformly Anchored on NiMoO₄ Nanorods, a Highly Active Hierarchical Nanostructure Catalyst for Oxygen Evolution Reaction and Pseudo‐Capacitors

[Mo₂S₁₂]²⁻ Complex as a Precursor for In‐situ Generation of Molybdenum Sulfide Catalyst During the H₂ Evolution

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Reactive Pulsed Laser Deposition of Clustered-Type MoSx (x ~ 2, 3, and 4) Films and Their Solid Lubricant Properties at Low Temperature

Cited by 39 publications

References 54 publications

Specific Features of Reactive Pulsed Laser Deposition of Solid Lubricating Nanocomposite Mo–S–C–H Thin-Film Coatings

Specific Features of Reactive Pulsed Laser Deposition of Solid Lubricating Nanocomposite Mo–S–C–H Thin-Film Coatings

MoS2 Nanosheets Uniformly Anchored on NiMoO4 Nanorods, a Highly Active Hierarchical Nanostructure Catalyst for Oxygen Evolution Reaction and Pseudo‐Capacitors

[Mo2S12]2− Complex as a Precursor for In‐situ Generation of Molybdenum Sulfide Catalyst During the H2 Evolution

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MoS₂ Nanosheets Uniformly Anchored on NiMoO₄ Nanorods, a Highly Active Hierarchical Nanostructure Catalyst for Oxygen Evolution Reaction and Pseudo‐Capacitors

[Mo₂S₁₂]²⁻ Complex as a Precursor for In‐situ Generation of Molybdenum Sulfide Catalyst During the H₂ Evolution