Coherent carbon cryogel-ammonia borane nanocomposites for H2 storage.
Coherent carbon cryogel-ammonia borane (C-AB) nanocomposites were synthesized, and improved H2 storage properties are reported. Porous carbon cryogels were impregnated with AB in tetrahydrofuran solution at 25 degrees C under argon; 30% of the carbon cryogel pore volume was filled to produce a 24 wt % C-AB nanocomposite. Nitrogen sorption isotherms, X-ray diffraction, differential scanning calorimetry, differential thermal/thermal gravimetric analyses, mass spectrometry, and 11B NMR were used to characterize the coherent C-AB nanocomposites. Findings include a merged two-step hydrogen release reaction with an appreciable reduction in the dehydrogenation temperature to <90 degrees C as well as the suppression of borazine release. The possible nanosize effects on the H2 storage properties are discussed.
Feaver
Aaron
A
Materials Science & Engineering, University of Washington, Seattle, WA 98195, USA.
Sepehri
Saghar
S
Shamberger
Patrick
P
Stowe
Ashley
A
Autrey
Tom
T
Cao
Guozhong
G