Catalytic gas-phase hydrogenation of CO2 into CH4 was tested under three different nickel/aluminate catalysts obtained from precursors hexaaluminate composition (MAl16O19, M = Mg, Ca, Ba). These were prepared using a carbon template method, where is self-generated sol-gel that contains an excess citric acid and the Al salts (Ba2+, Ca2+, Mg2+) by two-step calcination in inert/oxidizing atmospher...

This paper demonstrates the possibility of creating oxygen deficiency in perovskites A+3B+3O3 by introducing two types cations with different charges into B-sublattice. For this, it is proposed to introduce a two-charged cation, for example, Zn2+, as an alternative alkaline earth metals. Previously, this was demonstrated aluminate LaAlO3 and indate LaInO3. In article, we have focused on modific...

This overview on one of the subjects treated in our group deals with the synthesis and study of low-dimensional polymer and molecular solid state structures formed with alkaline earth metal ions in non-aqueous solvents. We have chosen several synthetic approaches in order to obtain such compounds. The first concept deals with the "cutting out" of structural fragments from a solid state structur...

We report on the formation of mixed alkali-alkaline earth molecules (LiCa) on helium nanodroplets and present a comprehensive experimental and theoretical study of the ground and excited states of LiCa. Resonance enhanced multiphoton ionization time-of-flight (REMPI-TOF) spectroscopy and laser induced fluorescence (LIF) spectroscopy were used for the experimental investigation of LiCa from 1500...

The use of autoionization as a tool to quantitatively analyze transitions between high-n strontium Rydberg states with low-to-intermediate values L is described and demonstrated through observations Rabi oscillations when driving 5snf 1F3 → 5s(n + 1)g 1G4, 2)h 1H5, 5snp 1P1 1)d 1D2 using microwave fields. technique shown offer advantages compared selective field ionization can be used other alk...

We have measured the a. c. conductivity of pure BaFz single crystals up to 1 336 K. At the higher temperatures we observed polarisation effects possibly due to a reaction of the crystal with the atmosphere in the cell. The defect energies derived from the low temperature region agree well with those obtained by Barsis and Taylor [27, 281. The effect of the high temperature phase transition on t...

Developing of new rare-earth (RE)-doped optical fibres for power amplifiers and lasers requires continuous improvements in the fibre spectroscopic properties (like shape and width of the gain curve, optical quantum efficiency, resistance to spectral hole burning and photodarkening,...). Silica glass as a host material for fibres has proved to be very attractive. However some potential applicati...