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Stabilization of NaZn(BH4)3 via nanoconfinement in SBA-15 towards enhanced hydrogen release

Journal Article


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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.

Publication Date


  • 2013

Citation


  • Xia, G., Li, L., Guo, Z., Gu, Q., Guo, Y., Yu, X., Liu, H. K. & Liu, Z. (2013). Stabilization of NaZn(BH4)3 via nanoconfinement in SBA-15 towards enhanced hydrogen release. Journal of Materials Chemistry A, 1 (2), 250-257.

Scopus Eid


  • 2-s2.0-84876521527

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=8149&context=engpapers&unstamped=1

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/5217

Has Global Citation Frequency


Number Of Pages


  • 7
  • 7

Start Page


  • 250

End Page


  • 257

Volume


  • 1

Issue


  • 2

Place Of Publication


  • United Kingdom

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.

Publication Date


  • 2013

Citation


  • Xia, G., Li, L., Guo, Z., Gu, Q., Guo, Y., Yu, X., Liu, H. K. & Liu, Z. (2013). Stabilization of NaZn(BH4)3 via nanoconfinement in SBA-15 towards enhanced hydrogen release. Journal of Materials Chemistry A, 1 (2), 250-257.

Scopus Eid


  • 2-s2.0-84876521527

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=8149&context=engpapers&unstamped=1

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/5217

Has Global Citation Frequency


Number Of Pages


  • 7
  • 7

Start Page


  • 250

End Page


  • 257

Volume


  • 1

Issue


  • 2

Place Of Publication


  • United Kingdom