We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Thermoanalytical and NMR investigation of NaBH<sub>4</sub> × 2H<sub>2</sub>O thermolysis process.
- Authors
Arkhangelskii, I. V.; Tarasov, V. P.; Kravchenko, O. V.; Kirakosyan, G.; Tsvetkov, M. V.; Solovev, M. V.; Dobrovolskii, Yu. A.; Shihovzev, A. V.
- Abstract
The article describes the thermolysis process of sodium borohydride dihydrate in thermoanalytical experiments. The reaction was carried out without solid catalyst and with catalyst as cobalt boride Co2B. It has been found out that in both cases the process starts after the peritectic reaction of the starting compound and forms a liquid phase. The enthalpy of peritectic reaction is Δ<italic>H</italic>react = 19 ± 2 kJ mol−1. When thermolysis proceeds in acetonitrile solution without a catalyst, intermediate hydroxyborohydride NaBH3OH or/and Na(BH3)2OH is formed according to the NMR experiment data. The formation of similar complexes in the solid phase is confirmed by experiments on the oxidation of the thermolysis products. Thermolysis process with solid catalyst proceeds with an intense exothermic effect at more lower temperatures. The kinetics of the non-catalytic process is described by the model of two consecutive reactions, and reaction with the solid catalyst model is approximated by two parallel reactions.
- Subjects
SODIUM borohydride; THERMAL analysis; NUCLEAR magnetic resonance spectroscopy; THERMOLYSIS; CARBON monoxide; INTERMEDIATES (Chemistry)
- Publication
Journal of Thermal Analysis & Calorimetry, 2018, Vol 132, Issue 1, p155
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-017-6953-5