1. Synthesis and hydrogen storage capacity of exfoliated turbostratic carbon nanofibers
- Author
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Wu, Hung-Chih, Li, Yuan-Yao, and Sakoda, Akiyoshi
- Subjects
- *
HYDROGEN production , *SYNTHESIS gas , *THERMAL analysis , *CHEMICAL decomposition , *NANOFIBERS , *CHEMICAL vapor deposition , *GRAPHITE , *ALCOHOL - Abstract
Abstract: Turbostratic carbon nanofibers (CNFs) with a rough surface, open pore walls, and a defect structure were continuously produced by the thermal decomposition of alcohol in the presence of an iron catalyst and a sulfur promoter at 1100°C under a nitrogen atmosphere in a vertical chemical vapor deposition reactor. A graphite exfoliation technique using intercalation and thermal shock was employed to expand the graphene layers of the as-produced turbostratic CNFs. The hydrogen storage capacity of the turbostratic CNF samples was measured using the volumetric method with a pressure of up to 1MPa at 77K. The hydrogen storage capacities of the as-produced and exfoliated turbostratic CNFs were 1.5 and 5wt%, respectively. The defects on the surface and expandable graphitic structure are considered important keys to increasing the hydrogen uptake in turbostratic CNFs. [Copyright &y& Elsevier]
- Published
- 2010
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