Advances in Energy Research

  • 제4권2호
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  • Pages.177-187
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  • 2016
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  • 2287-6316(pISSN)
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  • 2287-6324(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Mechanistic insights of metal acetylacetonate-aided dehydrocoupling of liquid-state ammonia borane NH3BH3

  • Pereza, Manon (IEM (Institut Europeen des Membranes), UMR5635 (CNRS, ENSCM, UM), Universite de Montpellier) ;
  • Mieleb, Philippe (IEM (Institut Europeen des Membranes), UMR5635 (CNRS, ENSCM, UM), Universite de Montpellier) ;
  • Demirci, Umit B. (IEM (Institut Europeen des Membranes), UMR5635 (CNRS, ENSCM, UM), Universite de Montpellier)
  • 투고 : 2015.12.12
  • 심사 : 2016.04.06
  • 발행 : 2016.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

Ammonia borane $NH_3BH_3$ solubilized in organic solvent is a potential liquid-state chemical hydrogen storage material. In this study, metal acetylacetonates like $Fe(O_2C_5H_7)_3$, $Co(O_2C_5H_7)_2$, $Ni(O_2C_5H_7)_2$, $Pd(O_2C_5H_7)_2$, $Pt(O_2C_5H_7)_2$ and $Ru(O_2C_5H_7)_3$ are considered for assisting dehydrocoupling of ammonia borane in diglyme (0.135 M) at $50^{\circ}C$. The molar ratio between ammonia borane and metal acetylacetonate is fixed at 100. A protocol for the separation of the soluble and insoluble fractions present in the slurry is proposed; it consists in using acetonitrile to make the precipitation of metal-based compounds easier and to solubilize boron-based intermediates/products. The nature of the metal does not affect the dehydrocoupling mechanisms, the $^{11}B\{^1H\}$ NMR spectra showing the formation of the same reaction intermediates. The aforementioned metal acetylacetonates do mainly have effect on the kinetics of dehydrocoupling. Dehydrocoupling takes place heterogeneously and dehydrogenation of ammonia borane in these conditions leads to the formation of polyborazylene via intermediates like e.g., B-(cyclodiborazanyl) amine-borane and borazine. Our main results are reported and discussed herein.

키워드

과제정보

연구 과제 주관 기관 : CNRS (Centre National de la Recherche Scientifique)

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피인용 문헌

  1. Boron-enriched advanced energy materials vol.471, 2018, https://doi.org/10.1016/j.ica.2017.11.037
  2. Ammonia Borane Nanospheres for Hydrogen Storage vol.2, pp.2, 2016, https://doi.org/10.1021/acsanm.9b00176