Abstract
The hydrogen content and hydrogen desorption characteristics of carbon nanotubes and graphite nanofibres are investigated to examine the potential application of these structures as hydrogen storage media. Carbon nanotubes are prepared by microwave plasma-assisted chemical vapour deposition (CVD), and graphite nanofibres are prepared by thermal chemical vapour deposition. The hydrogen contents of the carbon nanotubes and graphite nanofibres were approximately 8.6 and 0.77 wt.%, respectively. The high hydrogen desorption temperature of the as-prepared carbon nanotubes (peak at 1000 °C) was successfully lowered to 650 °C by sputtering of a 100 nm Pt or Ni coating.
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