Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Tuesday 6th February 2018 from 11.00am to 11.15am (GMT).

During this time our website performance may be temporarily affected. If you have any questions please use the feedback button available under our menu button. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 3, 2018
Previous Article Next Article

Tuning the structural stability of LiBH4 through boron-based compounds towards superior dehydrogenation

Author affiliations

Abstract

The remarkable destabilization effects of H3BO3, HBO2, and B2O3 on dehydrogenation of LiBH4 are revealed in this work. The effectiveness of destabilizing the structural stability is in the order of H3BO3 > HBO2 > B2O3. Besides, through optimizing the molar ratio of LiBH4 and H3BO3 and milling treatment, the destabilization effect, especially for dehydrogenation kinetics, is further enhanced. For example, at a temperature as low as 110 °C, 5.8 wt% hydrogen can be liberated in seconds from 2LiBH4–H3BO3 prepared through pre-milling. The investigation reveals that each of the LiBH4–H3BO3, LiBH4–HBO2 and LiBH4–B2O3 systems undergo multiple dehydrogenation stages corresponding to different destabilization mechanisms. The reaction at lower temperature is ascribed to the H+⋯H coupling mechanism which should be enhanced by the [OH]⋯[BH4] interaction mode. Pre-milling treatment of LiBH4 and H3BO3 also promotes the H+⋯H interaction which may have originated from the increasing contact area as a result of the fine particles, and therefore probably reduced the reaction activation energy. Consequently, it gives rise to the superior dehydrogenation performance of lower temperature, rapid kinetics, pure hydrogen and high capacity, which are required for off-board hydrogen energy vehicle application.

Graphical abstract: Tuning the structural stability of LiBH4 through boron-based compounds towards superior dehydrogenation

Back to tab navigation

Supplementary files

Publication details

The article was received on 24 Oct 2017, accepted on 11 Dec 2017 and first published on 11 Dec 2017


Article type: Paper
DOI: 10.1039/C7TA09376D
Citation: J. Mater. Chem. A, 2018,6, 1171-1180
  •   Request permissions

    Tuning the structural stability of LiBH4 through boron-based compounds towards superior dehydrogenation

    W. Cai, J. Chen, L. Liu, Y. Yang and H. Wang, J. Mater. Chem. A, 2018, 6, 1171
    DOI: 10.1039/C7TA09376D

Search articles by author

Spotlight

Advertisements