Coherent Carbon Cryogel−Ammonia Borane Nanocomposites for H2 Storage

• DOI: 10.1021/jp072448t
• Publication Date: 2007-06-14T12:50:00Z
• Authors: Aaron Feaver; Saghar Sepehri; Patrick Shamberger; Ashley Stowe; Tom Autrey; Guozhong Cao
• Keywords: Ammonia Borane; Thermogravimetric analysis; Gravimetric analysis; Carbon fibers

Coherent carbon cryogel−ammonia borane (C−AB) nanocomposites were synthesized, and improved H2 storage properties are reported. Porous cryogels impregnated with AB in tetrahydrofuran solution at 25 °C under argon; 30% of the cryogel pore volume was filled to produce a 24 wt % C−AB nanocomposite. Nitrogen sorption isotherms, X-ray diffraction, differential scanning calorimetry, thermal/thermal gravimetric analyses, mass spectrometry, 11B NMR used characterize coherent nanocomposites. Findings include merged two-step hydrogen release reaction an appreciable reduction dehydrogenation temperature <90 as well suppression borazine release. The possible nanosize effects on discussed.