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Robust 3D Boron Nitride Nanoscaffolds for Remarkable Hydrogen Storage Capacity from Ammonia Borane
Author(s) -
Salameh Chrystelle,
Moussa Georges,
Bruma Alina,
Fantozzi Gilbert,
Malo Sylvie,
Miele Philippe,
Demirci Umit B.,
Bernard Samuel
Publication year - 2018
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201700618
Subject(s) - ammonia borane , hydrogen storage , materials science , mesoporous material , crystallinity , boron nitride , chemical engineering , pyrolysis , borane , gravimetric analysis , ceramic , hydrogen , template method pattern , boron , nanotechnology , composite material , organic chemistry , catalysis , chemistry , alloy , engineering
Abstract 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 °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 °C; this value demonstrates the high potential of this system as a safe potential hydrogen storage material.