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0226U000029,
(0125U001328)
,
Development of efficient nanostructured materials based on Mg, Ti and Ni for hydrogen storage and generation in hydrogen energy devices
Синтез дослідних зразків нанокомпозитів на основі Mg, Ti та Ni та дослідження їх властивостей.
Kononiuk Oleksandr P., Доктор філософії
01-01-2026
Physico-Mechanical Institute named after GV Karpenko of the National Academy of Sciences of Ukraine
The establishment of fundamental aspects of the relationships between the composition, structure, and properties of composite materials based on Mg, Ti, and Ni, which include both crystalline and nanostructured components (and, for selected samples, various types of substrates), aimed at the development of advanced materials with enhanced functional characteristics for use in devices for hydrogen generation and storage.
In this work, the synthesis and the influence of nanostructured catalytic additives Fe100-xCoxOy and Fe100-xNixOy (x = 0, 25, 50, 75, and 100) on magnesium hydrogenation and hydrogen release via hydrolysis were investigated. It was shown that the introduction of these additives reduces the hydrogenation time of magnesium by more than a factor of three compared to pure Mg. For composites containing Fe100-xCoxOy, a clear dependence of the hydrogenation rate, particle dispersion, and degree of conversion in the hydrolysis reaction on the cobalt content was established. The most balanced performance in terms of hydrogenation kinetics and hydrogen yield during hydrolysis was demonstrated by composites with Fe75Co25Oy and Fe50Co50Oy additives, making them promising universal catalysts for hydrogen energy systems. In addition, the electrochemical deposition and properties of Ni–Mo system coatings for electrocatalytic hydrogen generation were studied. It was found that increasing the sodium citrate concentration in the electrolyte up to 1.0 M promotes an increase in the Mo content in the coatings, whereas further concentration increase leads to its decrease. Coatings with elevated Mo and O contents (up to 44.13 wt.% Mo and 7.82 wt.% O) exhibited a minimal hydrogen evolution overpotential (0.136 V) and a reduced Tafel slope, indicating improved reaction kinetics. Thermal treatment of highly alloyed Ni–Mo coatings at 950 °C for 1 h was shown to ensure high electrocatalytic activity in alkaline media.
Oleksandr P. Kononiuk
Svitlana A. Halaichak
Khrystyna I. Vlad
Volodymyr O. Oprysk
Maksym V. Danylchuk
2026-01-01
Updated: 2026-01-01
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