High Influence of Potassium Bromide on Thermal Decomposition of Ammonia Borane

Nikola Biliškov, Danijela Vojta, László Kótai, Imre Miklós Szilágyi, Dávid Hunyadi, T. Pasinszki, Sandra Flinčec Grgac, Andreas Borgschulte, Andreas Züttel

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The present paper presents a thorough experimental investigation of mechanistic pathways of thermal decomposition of ammonia borane (AB) and its mixture with KBr. A comparative detection and temperature-dependent in situ monitoring of the decomposition products was done by use of temperature-dependent infrared (IR) spectroscopy of both solid (in transmission through KBr pellets and ATR mode) and gaseous products, thermogravimetry (TG) and evolved gas analysis mass spectroscopy (EGA-MS). This enables discrimination of the processes occurring in the bulk from those in the near-surface level. For the first time, a high influence of the KBr matrix on AB decomposition was found and thoroughly investigated. Although KBr does not change the chemical and physical identity of AB at ambient conditions, it dramatically affects its thermal decomposition pathway. It is found that the presence of KBr not only favors the production of diammoniate of diborane in the induction phase, but also enables an efficient catalysis of AB decomposition by NH4 + ions, present at the KBr-AB interface, which leads to suppression of emission of unwanted gaseous side products other than NH3. IR spectroscopy was also used to shed a light on the molecular background of the frequently observed, but never investigated increase of the mass of decomposition products.

Original languageEnglish
Pages (from-to)25276-25288
Number of pages13
JournalJournal of Physical Chemistry C
Volume120
Issue number44
DOIs
Publication statusPublished - Nov 10 2016

Fingerprint

potassium bromides
Boranes
boranes
Ammonia
thermal decomposition
Potassium
ammonia
Pyrolysis
Decomposition
decomposition
products
Infrared spectroscopy
infrared spectroscopy
diborane
Gas fuel analysis
gas analysis
thermogravimetry
pellets
Catalysis
catalysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

Cite this

Biliškov, N., Vojta, D., Kótai, L., Szilágyi, I. M., Hunyadi, D., Pasinszki, T., ... Züttel, A. (2016). High Influence of Potassium Bromide on Thermal Decomposition of Ammonia Borane. Journal of Physical Chemistry C, 120(44), 25276-25288. https://doi.org/10.1021/acs.jpcc.6b09511

High Influence of Potassium Bromide on Thermal Decomposition of Ammonia Borane. / Biliškov, Nikola; Vojta, Danijela; Kótai, László; Szilágyi, Imre Miklós; Hunyadi, Dávid; Pasinszki, T.; Flinčec Grgac, Sandra; Borgschulte, Andreas; Züttel, Andreas.

In: Journal of Physical Chemistry C, Vol. 120, No. 44, 10.11.2016, p. 25276-25288.

Research output: Contribution to journalArticle

Biliškov, N, Vojta, D, Kótai, L, Szilágyi, IM, Hunyadi, D, Pasinszki, T, Flinčec Grgac, S, Borgschulte, A & Züttel, A 2016, 'High Influence of Potassium Bromide on Thermal Decomposition of Ammonia Borane', Journal of Physical Chemistry C, vol. 120, no. 44, pp. 25276-25288. https://doi.org/10.1021/acs.jpcc.6b09511
Biliškov, Nikola ; Vojta, Danijela ; Kótai, László ; Szilágyi, Imre Miklós ; Hunyadi, Dávid ; Pasinszki, T. ; Flinčec Grgac, Sandra ; Borgschulte, Andreas ; Züttel, Andreas. / High Influence of Potassium Bromide on Thermal Decomposition of Ammonia Borane. In: Journal of Physical Chemistry C. 2016 ; Vol. 120, No. 44. pp. 25276-25288.
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