Improved dehydrogenation properties of the combined Mg(BH4) 2·6NH3-nNH3BH3 system

Authors

Xiaowei Chen, Fudan University
Feng Yuan, Fudan University
Qinfen Gu, Australian Synchrotron Company
Yingbin Tan, Fudan University
Hua-Kun Liu, University of WollongongFollow
S X. Dou, University of WollongongFollow
Xuebin Yu, Fudan UniversityFollow

RIS ID

85105

Publication Details

Chen, X., Yuan, F., Gu, Q., Tan, Y., Liu, H., Dou, S. & Yu, X. (2013). Improved dehydrogenation properties of the combined Mg(BH4) 2·6NH3-nNH3BH3 system. International Journal of Hydrogen Energy, 38 (36), 16199-16207.

Abstract

A combined strategy via mixing Mg(BH4)2·6NH3 with ammonia borane (AB) is employed to improve the dehydrogenation properties of Mg(BH4)2·6NH3. The combined system shows a mutual dehydrogenation improvement in terms of dehydrogenation temperature and hydrogen purity compared to the individual components. A further improved hydrogen liberation from the Mg(BH4)2·6NH3–6AB is achieved with the assistance of ZnCl2, which plays a crucial role in stabilizing the NH3 groups and promoting the recombination of NHδ+⋯HBδ−. Specifically, the Mg(BH4)2·6NH3–6AB/ZnCl2 (with a mole ratio of 1:0.5) composite is shown to release over 7 wt.% high-pure hydrogen (>99 mol%) at 95 °C within 10 min, thereby making the combined system a promising candidate for solid hydrogen storage.