INVESTIGATIONS OF THE INFLUENCE OF DIFFERENT ADDITIVES TO THE LANTHANUM RICH MISCHMETAL

Self-sufficient PV-H2 Alternative Energy Objects

Energy storage becomes more important as mankind switch to renewable energy, away from fossil resources. Traditional way – batteries - offer a limited number of cycles, require regular maintenance; nevertheless gravitational storage, flywheels, compressed air are mainly large scale and expensive methods. The hydrogen as energy carrier and hydrogen fuel cells are possible option to store different amounts of energy for relatively long times with low losses. Different solutions for self-sufficient sun/wind energy objects are analysed - the solar radiation collecting systems, wind power generators, and high pressure electrolysis technologies for hydrogen production and the metal-hydride energy…

Preparation and photoactivity of electrophoretic TiO2coating film

TiO2 thin films have been obtained by a sol-electrophoretic deposition method on metallic Ti and Pt substrates. X-ray diffraction, Raman spectroscopy and scanning electron microscopy were used to investigate the structure and morphology of plated materials. Annealed TiO2 films mainly are formed in anatase structure with different morphology depending on substrate material. Light induced potential measurements indicate that the morphology substantially have an impact on photoactivity of TiO2 thin films.

Hydrogen Sorption Properties of Metal Hydride and Glass Phase

This work is devoted to the development of a new composite material for hydrogen storage and to investigation of physical and chemical characteristics of material. The new composite material is formed by combination of AB5 type lanthanum nickel alloy with a glass based on silica. Thermogravimetric and XRD measurements prove that the new material absorbs more hydrogen than both constituents separately. That is explained by hydrogen sorption in the composite material due to the hydrogen spillover phenomena, where the hydrogen molecules dissociated on the surface of catalyst in atoms and spills over to the inert surface. That causes the increase of catalytic activity of an alloy and the presen…

Estimation of hydrogen transfer mechanisms in composite materials

Abstract Spill-over effect as a hydrogen transfer mechanism is proposed to explain an increased capacity of hydrogen absorption and improvement of hydrogen activation kinetics in composite material based on the AB5 type metal hydride and powdered glass. A raw lanthanum nickel alloy AB5 with small amount of additives was used as catalyst and bulk material for hydrogen storage, and a borosilicate glass powder with developed surface was applied as a support material. Thermogravimetric technique to determine an absorbed amount of the hydrogen in materials and X-ray powder diffraction analysis for structural investigations was used.

WO 3 as Additive for Efficient Photocatalyst Binary System TiO 2 /WO 3

The financial support provided by Scientific Research Project for Students and Young Researchers No. SJZ/2018/9 implemented at the Institute of Solid State Physics, University of Latvia is greatly acknowledged. Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the Euro-pean Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART².