A synthesis method for cobalt doped carbon aerogels with high surface area and their hydrogen storage properties

作者：Tian H Y^*; Buckley C E; Sheppard D A; Paskevicius M; Hanna N

来源：International Journal of Hydrogen Energy, 2010, 35(24): 13242-13246.

DOI：10.1016/j.ijhydene.2010.09.018

• Metal-doped carbon aerogels
• Hydrogen storage
• Nanoparticles

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 (similar to 1667 m(2) g(-1)) and larger micropore volume (similar to 0.6 cm(3) g(-1)) 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 similar to 4.38 wt.% H(2) uptake under 4.6 MPa at -196 degrees C. The hydrogen uptake capacity with respect to unit surface area was greater than for pure carbon aerogel and resulted in similar to 1.3 H(2) (Wt. %) per 500 m(2) g(-1). 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.

• 出版日期2010-12
• 单位CSIRO