Crystal lattice of solid body can store simultaneously both molecules and atoms of hydrogen in quantities

The regularities of the effect exerted by gas molecules from the residual atmosphere in the vacuum chamber on the absorption characteristics of V0.9Ti0.1Nx thin-film were investigated. It is shown that the open nanoporous structure actively absorbs not only the hydrogen molecules but also the larger molecules. The saturation with hydrogen at 20 °C leads to the reduction of absorption capacity of the material (no more than 3 wt.%) and the increasing of the temperature of hydrogen desorption (500 °C) are observed. High temperature (250 °C) of hydrogen saturation may reduce the temperature of desorption up to 275 °C and increase the gravimetric capacity to 7 wt.%. It is shown that the hydrogen in the porous nanocrystalline structures can be maintained both in the intergranular and interparticle pores and at grain boundaries and in not filled by nitrogen sites of V0.9Ti0.1Nx grains. At that, the greatest amount of hydrogen is held just in the interparticle pores and vacant sites.