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Type: Journal article
Title: Stabilization of NaZn(BH₄)₃ via nanoconfinement in SBA-15 towards enhanced hydrogen release
Other Titles: Stabilization of NaZn(BH(4))(3) via nanoconfinement in SBA-15 towards enhanced hydrogen release
Author: Xia, G.
Li, L.
Guo, Z.
Gu, Q.
Guo, Y.
Yu, X.
Liu, H.
Liu, Z.
Citation: Journal of Materials Chemistry A, 2013; 1(2):250-257
Publisher: Royal Society of Chemistry
Issue Date: 2013
ISSN: 2050-7488
Statement of
Guanglin Xia, Li Li, Zaiping Guo, Qinfen Gu, Yanhui Guo, Xuebin Yu, Huakun Liua and Zongwen Liue
Abstract: In the present work, the decomposition behaviour of NaZn(BH4)3 nanoconfined in mesoporous SBA-15 has been investigated in detail and compared to bulk NaZn(BH4)3 that was ball milled with SBA-15, but not nanoconfined. The successful incorporation of nanoconfined NaZn(BH4)3 into mesopores of SBA-15 was confirmed by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, 11B nuclear magnetic resonance, nitrogen absorption/desorption isotherms, and Fourier transform infrared spectroscopy measurements. It is demonstrated that the dehydrogenation of the space-confined NaZn(BH4)3 is free of emission of boric by-products, and significantly improved hydrogen release kinetics is also achieved, with pure hydrogen release at temperatures ranging from 50 to 150 °C. By the Arrhenius method, the activation energy for the modified NaZn(BH4)3 was calculated to be only 38.9 kJ mol−1, a reduction of 5.3 kJ mol−1 compared to that of bulk NaZn(BH4)3. This work indicates that nanoconfinement within a mesoporous scaffold is a promising approach towards stabilizing unstable metal borohydrides to achieve hydrogen release with high purity.
Rights: This journal is © The Royal Society of Chemistry 2013
DOI: 10.1039/c2ta00195k
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Chemistry and Physics publications

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