Publications by authors named "Oxana Rubinkovskaya"

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-MoS (2 ≤ ≤ 3) matrix is due to the synergistic effect of the Mo nanoparticles (Mo-NP) formed during the laser ablation of a MoS target. This work looks at the possibility of employing a-MoS/NP-Mo films (4 and 20 nm thickness) to produce hydrogen by photo-stimulated HER using a p-Si cathode.

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We studied the possibility of using pulsed laser deposition (PLD) for the formation of a MoS/WSe2 heterostructure on a dielectric substrate. The heterostructure can be employed for effective solar water splitting to produce hydrogen. The sapphire substrate with the conducting C(B) film (rear contact) helped increase the formation temperature of the WSe film to obtain the film consisting of 2H-WSe near-perfect nanocrystals.

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This work studies the factors that affect the efficiency of the photoelectrochemical hydrogen evolution reaction (HER) using MoS/WO nano-heterostructures obtained by reactive pulsed laser deposition (RPLD) on glass substrates covered with fluorinated tin oxide (FTO). Another focus of the research is the potential of MoS nanofilms as a precursor for MoO(S) nanofilms, which enhance the efficiency of the photo-activated oxygen evolution reaction (OER) using the MoO(S)/WO/FTO heterostructures. The nanocrystalline WO film was created by laser ablation of a W target in dry air at a substrate temperature of 420 °C.

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Pulsed laser ablation of MoS and WO 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 WO underlayer that was covered with composite MoS/np-Mo nanocatalyst. The use of dry air with pressures of 40 and 80 Pa allowed the formation of porous WO films with cauliflower- and web-like morphology, respectively.

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