A synthesis method for cobalt doped carbon aerogels with high surface area and their hydrogen storage properties
✍ Scribed by H.Y. Tian; C.E. Buckley; D.A. Sheppard; M. Paskevicius; N. Hanna
- Book ID
- 103832778
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 591 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0360-3199
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✦ Synopsis
Carbon aerogels doped with nanoscaled Co particles were prepared by first coating activated carbon aerogels using a wet-thin layer coating process. The resulting metal-doped carbon aerogels had a higher surface area (w1667 m 2 g À1 ) and larger micropore volume (w0.6 cm 3 g À1 ) than metal-doped carbon aerogels synthesised using other methods suggesting their usefulness in catalytic applications. The hydrogen adsorption behaviour of cobalt doped carbon aerogel was evaluated, displaying a high w4.38 wt.% H 2 uptake under 4.6 MPa at À196 C. The hydrogen uptake capacity with respect to unit surface area was greater than for pure carbon aerogel and resulted in w1.3 H 2 (wt. %) per 500 m 2 g À1 . However, the total hydrogen uptake was slightly reduced as compared to pure carbon aerogel due to a small reduction in surface area associated with cobalt doping. The improved adsorption per unit surface area suggests that there is a stronger interaction between the hydrogen molecules and the cobalt doped carbon aerogel than for pure carbon aerogel.