Hydrogen uptake in multi-walled carbon nanotubes at room temperature

Carbon nanotubes used in this experiment were grown from a acetylene-hydrogen mixture on a support using different catalyst precursors. The surface characteristics of carbon nanotubes determined the interaction with hydrogen, so the materials thus produced were submitted to three different treatments, namely nitric acid, alkali solution and heating under argon to gain favorable adsorption surface, these treatments improved surface area and surface activity effectively. At last it can absorb similar to5 wt% of hydrogen at room temperature under 100 atm, and the result is stable.