Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Synthesis and thermal decomposition of $Zn[BH_4]_2$

$Zn[BH_4]_2$ 분말의 합성과 열분해 특성

  • Jeon, Eun (Nano-Materials Research Center, Korea Institute of Science and Technology) ;
  • Cho, Young-Whan (Nano-Materials Research Center, Korea Institute of Science and Technology)
  • 전은 (한국과학기술연구원, 나노재료연구센터) ;
  • 조영환 (한국과학기술연구원, 나노재료연구센터)
  • Published : 2005.09.15
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Abstract

[ $Zn(BH_4)_2$ ](8.4 wt% theoretical hydrogen storage capacity powders have been successfully synthesized by mechanochemical reaction from mixtures of $ZnCl_2$ and $NaBH_4$ powders in a 1:2 molar ratio in different times. $$ZnCl_2+2NaBH_4{\rightarrow}Zn(BH_4)_2+2NaCl$$ (1) $Zn(BH_4)_2$ powders were characterized by X-ray diffractometry(XRD), and Furier Transform Infrared spectrometry(FT-IR). The thermal stabilities of $Zn(BH_4)_2$ powders were studied by Differential scanning calorimetry(DSC), Thermogravimetry analysis(TGA), and Mass spectrometry(MS). $Zn(BH_4)_2$ can be tested for hydrogen evolution without further purification. The reaction to yield hydrogen is irreversible, the other products being compounds of Zn, and borane. $Zn(BH_4)_2$ thermally decomposes to release borane and hydrogen gas between about 85 and 150$^{\circ}C$.

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References

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