期刊
ENERGY TECHNOLOGY
卷 6, 期 3, 页码 570-577出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.201700618
关键词
ammonia borane; boron nitride; hydrogen storage; mesoporous materials; nanoconfinement
资金
- European Community's Seventh Framework Programme through a Marie-Curie Research Training Network (FUnctional Nitrides for Energy Applications-FUNEA) [ITN-2010-264873]
- University of Montpellier through the project entitled le nitrure de bore pour des applications energie
Mesoporous monolithic (3D) boron nitride (BN) structures are synthesized using a template-assisted polymer-derived ceramic route. Polyborazylene is selected to impregnate monolithic activated carbon, which is used as template. After pyrolysis and template removal, this method supplies BN compounds with controlled crystallinity and tunable textural properties controlled by the temperature at which they have been annealed (from 1000 to 1450 degrees C). Monoliths with an interconnected mesoporous network, high specific surface areas from 584 to 728 m(2) g(-1), significant pore volumes from 0.75 to 0.93 cm(3) g(-1), and a relatively high compressive strength are generated. These highly porous compounds are used as nanoscaffolds to confine ammonia borane (AB). The composites provide an effective gravimetric hydrogen capacity of up to 8.1 wt%, based on AB measured at 100 degrees C; this value demonstrates the high potential of this system as a safe potential hydrogen storage material.
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