Coherent Carbon Cryogel-Ammonia Borane Nanocomposites for H2 Storage
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- 作者：Aaron Feaver ; Saghar Sepehri ; Patrick Shamberger ; Ashley Stowe ; Tom Autrey ; Guozhong Cao
- 刊名：Journal of Physical Chemistry B
- 出版年：2007
- 出版时间：July 5, 2007
- 年：2007
- 卷：111
- 期：26
- 页码：7469 - 7472
- 全文大小：266K
- 年卷期：v.111,no.26(July 5, 2007)
- ISSN：1520-5207
文摘
Coherent carbon cryogel-ammonia borane (C-AB) nanocomposites were synthesized, and improved H2storage properties are reported. Porous carbon cryogels were impregnated with AB in tetrahydrofuran solutionat 25 
C under argon; 30% of the carbon cryogel pore volume was filled to produce a 24 wt % C-ABnanocomposite. Nitrogen sorption isotherms, X-ray diffraction, differential scanning calorimetry, differentialthermal/thermal gravimetric analyses, mass spectrometry, and 11B NMR were used to characterize the coherentC-AB nanocomposites. Findings include a merged two-step hydrogen release reaction with an appreciablereduction in the dehydrogenation temperature to <90 C as well as the suppression of borazine release. Thepossible nanosize effects on the H2 storage properties are discussed.
C under argon; 30% of the carbon cryogel pore volume was filled to produce a 24 wt % C-ABnanocomposite. Nitrogen sorption isotherms, X-ray diffraction, differential scanning calorimetry, differentialthermal/thermal gravimetric analyses, mass spectrometry, and 11B NMR were used to characterize the coherentC-AB nanocomposites. Findings include a merged two-step hydrogen release reaction with an appreciablereduction in the dehydrogenation temperature to <90 C as well as the suppression of borazine release. Thepossible nanosize effects on the H2 storage properties are discussed.