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58. Solids Structural Chemistry Department


Laboratories

58.01. Laboratory of Continuous Refractory Fibres and Technology of the Gas phase Chemical Besieging
58.02. Materials and electrochemical processes in hydrogen energy industry

Main courses of discovery

  • The creating of nanostructured, high-entropy and film materials for hydrogen storage and chemical power sources. The researching of their hydrogen-sorption and photocatalytic properties.

  • Development of physical and chemical principles for creation of new generation materials based on carbides, nitrides and oxides in nonequilibrium structural condition using information about their crystal and electronic structure.

  • Obtaining coatings and fibers by chemical vapor deposition. Development of fiber composite materials with polymer matrix and metal-reinforced continuous silicon carbide fibers.

  • Phase transformations in carbon and boron nitride under high pressures, shock-wave synthesis of superhard phases, laws governing structure formation of ceramic materials, and physics and technology of thin films.

Themes of scientific research

  • The investigation of synthesis conditions of mechanical alloys (Mg-based nanocomposites with the different dopant of transition metals) on the kinetics of hydrogenation-dehydrogenation and the temperature of destroy of established hydride phase Mg(Me)H2.
  • Research electrochemical and sorption characteristics hydrogen-sorption containing magnesium intermetallic АВ3 (La1-XMgXNi3) and high entropy polymetallic (Ti, Zr, V, Nb) alloys depending on their structure and phase composition.
  • The study features of phase transformations during thermal desorption of hydrogen in hydrogenated multicomponent alloys by high-temperature X-ray diffraction in real time.

Best results

  • The technique of making TiC films by CVD method was designed and the process of converting them into a photosensitive film of TiO2 by annealing in oxygen was investigated. Such films can be used to make photoanodes of photoelectrochemical cell for hydrogen generation.
  • The influence of alloying elements Ti, Fe, Ni (of 10% wt.) on hydrogen-sorption properties the hydride phase MgH2 of mechanical alloys of Mg + 10% Ni, Mg + 10% Ti and Mg + 10% Fe was investigated. It was established that doping Ti or Fe reduces the thermal stability of the hydride phase MgH2. The temperature of desorption of hydrogen is reduced from 320 °C to 260 ° C.
  • It was established that the stability of the alloy during cycling is determined by its corrosion and mechanical destruction. Depending on the alloy composition, the reason for the loss of capacity was different. For cobalt alloys, it was mainly in mechanical cracking, while for alloys without Co, dominated by corrosion due to the dissolution of the alloy elements, especially aluminum.

Equipment

  • Technology equipment for synthesis of semiconductor films using the chemical vapour deposition (CVD) method.
  • Vacuum electric furnace SNVE (1600 °C, 10-5 Torr) for synthesis of intermetallic compounds.
  • Computerized potentiometer-galvanometer PGSTAT4-16 for electrochemical measurements.
  • Transmission electron microscope ЕМ-200 for investigation of phase content and structure analysis of electrodes; X-ray difractometer DRON-3M for studies of crystal structure of electrodes.
  • A source of simulated sunlight-high pressure xenon lamp and a monochromator for spectral photoelectrochemical investigations.

Staff

Solonin Y.
ac., D.Ph.M.
Dubok V.
prof., D.Ch.S.
Fomichov O.

Hraivoronska K.
c.ph.m.
Hubareni N.

Iershova O.
s.r.sc., c.e.
Karpets M.
prof., D.Ph.M.
Korablov D.
s.r., D.F.
Olieinyk G.
s.r.sc., D.Ph.M.
Pokropyvnyy O.
c.ph.m.
Saviak M.
s.r.sc., c.e.
Shynkaruk O.

Velikanova T.
c.ch.

Publications

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