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Preparation of Zn(BH4)2 and diborane and hydrogen release properties of Zn(BH4)2+xMgH2 (x=1, 5, 10, and 15)

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Abstract

Zn(BH4)2 was prepared by milling ZnCl2 and NaBH4 in a planetary ball mill under Ar atmosphere, and Zn(BH4)2+xMgH2 (x=1, 5, 10, and 15) samples were prepared. Diborane (B2H6) and hydrogen release characteristics of the Zn(BH4)2 and Zn(BH4)2+xMgH2 samples were studied. The samples synthesized by milling ZnCl2 and NaBH4 contained Zn(BH4)2 and NaCl, together with small amounts of ZnCl2 and NaBH4. We designated these samples as Zn(BH4)2(+NaCl). The weight loss up to 400 °C of the Zn(BH4)2(+NaCl) sample synthesized by milling 4 h was 11.2 wt%. FT-IR analysis showed that Zn(BH4)2 was formed in the Zn(BH4)2(+NaCl) samples. MgH2 was also milled in a planetary ball mill, and mixed with the Zn(BH4)2(+NaCl) synthesized by milling for 4 h in a mortar and pestle. The weight loss up to 400 °C of Zn(BH4)2(+NaCl)+MgH2 was 8.2 wt%, corresponding to the weight % of diborane and hydrogen released from the Zn(BH4)2(+NaCl)+MgH2 sample, with respect to the sample weight. DTA results of Zn(BH4)2(+NaCl)+xMgH2 showed that the decomposition peak of Zn(BH4)2 was at about 61 °C, and that of MgH2 was at about 370-389 °C.

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Authors and Affiliations

  1. Department of Materials Engineering, Graduate School, Chonbuk National University, 567 Baekje-daero Deokjin-gu, Jeonju, 561-756, Republic of Korea

    Young Jun Kwak

  2. Professional Graduate School of Flexible and Printable Electronics, Chonbuk National University, 567 Baekje-daero Deokjin-gu, Jeonju, 561-756, Republic of Korea

    Sung Nam Kwon

  3. Division of Advanced Materials Engineering, Research Center of Advanced Materials Development, Engineering Research Institute, Chonbuk National University, 567 Baekje-daero Deokjin-gu, Jeonju, 561-756, Republic of Korea

    Myoung Youp Song

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  1. Young Jun Kwak
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  2. Sung Nam Kwon
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  3. Myoung Youp Song
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Correspondence to Myoung Youp Song.

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Kwak, Y.J., Kwon, S.N. & Song, M.Y. Preparation of Zn(BH4)2 and diborane and hydrogen release properties of Zn(BH4)2+xMgH2 (x=1, 5, 10, and 15). Met. Mater. Int. 21, 971–976 (2015). https://doi.org/10.1007/s12540-015-4604-6

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  • DOI: https://doi.org/10.1007/s12540-015-4604-6

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