High hydrogen storage capacity of heteroatom-containing porous carbon nanospheres produced from cross-linked polyphosphazene nanospheres
2012
Fu, Jianwei | Wang, Minghuan | Zhang, Chao | Zhang, Peng | Xu, Qun
Heteroatom-containing porous carbon nanospheres were fabricated by forming polyphosphazene nanospheres and carbonizing them with NaOH as activating agent. They were then examined as a material for hydrogen storage. N₂ sorption and H₂ sorption measurements showed that the carbon nanospheres possess a BET surface area of 1140m²g⁻¹, a total pore volume of 0.90m³g⁻¹, an ultramicropore volume of 0.30m³g⁻¹, a bimodal pore size distribution (3–5nm and 0.6–0.8nm diameter pores), and a gravimetric hydrogen uptake of 2.7 wt.% at 77k and 1atm.
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