Destabilization of NH3BH3 by Water During Hydrothermolysis as a Key Factor in the High Hydrogen Evolution Rates Full article
| Journal |
International Journal of Hydrogen Energy
ISSN: 0360-3199 , E-ISSN: 1879-3487 |
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| Output data | Year: 2016, Volume: 41, Number: 39, Pages: 17484-17495 Pages count : 12 DOI: 10.1016/j.ijhydene.2016.07.163 | ||||
| Tags | Ammonia borane, ATR-FTIR, Dihydrogen bonds destabilization, Hydrolysis, Hydrothermolysis, NH3BH3, Thermolysis | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Foundation for Basic Research | 15-08-04257 |
Abstract:
The rates of non-catalytic hydrolysis, thermolysis and hydrothermolysis of ammonia borane (NH3BH3, AB) at 80 °C and 90 °C have been compared. It was found that by using water-wetted AB and carrying out the process of hydrothermolysis results in an order of magnitude increase in the rate of hydrogen generation. The highest rate of AB hydrothermolysis accompanied by a drastic heat-up of the reaction layer was observed at the optimal water content in AB. Carrying out this process in a polyethylene medium which is poor heat conductor resulted in even higher efficiency of the process. On the basis of spectroscopic ATR-FTIR data we conclude that the high reactivity of AB in hydrothermolysis was most likely caused by destabilization of dihydrogen Bsingle bondHδ−–δ+Hsingle bondN bonds in the NH3BH3 crystal lattice by polar water molecules leading to an increased dispersion of hydride. This increase in dispersion results in enhanced AB reactivity in dehydrogenation and leads to formation of polyaminoborane (PAB). It was shown that PAB which is formed after release of one equivalent of hydrogen is hydrolyzed more easily comparing with starting AB. On the other hand, the products of AB and PAB hydrolysis are believed to be also capable of accelerating AB hydrogenation.
Cite:
Komova O.V.
, Kayl N.L.
, Odegova G.V.
, Netskina O.V.
, Simagina V.I.
Destabilization of NH3BH3 by Water During Hydrothermolysis as a Key Factor in the High Hydrogen Evolution Rates
International Journal of Hydrogen Energy. 2016. V.41. N39. P.17484-17495. DOI: 10.1016/j.ijhydene.2016.07.163 WOS Scopus РИНЦ ANCAN OpenAlex
Destabilization of NH3BH3 by Water During Hydrothermolysis as a Key Factor in the High Hydrogen Evolution Rates
International Journal of Hydrogen Energy. 2016. V.41. N39. P.17484-17495. DOI: 10.1016/j.ijhydene.2016.07.163 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Apr 18, 2016 |
| Accepted: | Jul 18, 2016 |
| Published online: | Aug 8, 2016 |
| Published print: | Oct 19, 2016 |
Identifiers:
| Web of science: | WOS:000384389300031 |
| Scopus: | 2-s2.0-84995618080 |
| Elibrary: | 27188845 |
| Chemical Abstracts: | 2016:1296574 |
| Chemical Abstracts (print): | 165:344773 |
| OpenAlex: | W2520909911 |