Hydrogen adsorption on metal coated Multiwalled Carbon nanotubes

We present results of volumetric adsorption measurements of hydrogen, on Palladium-Gold (Pd-Au) coated multiwalled carbon nanotubes (MWNT). The nanotubes were prepared using air assisted chemical vapor deposition technique and were subsequently purified (acid treatment) before coating them with Pd-Au. Hydrogen adsorption measurements were performed at 77.3 K on as produced MWNTs as well as purified MWNT and compared with the adsorption isotherm obtained on Pd-Au coated MWNT samples under same experimental conditions. The effect of coating the MWNTs with Pd-Au on the adsorption behavior of hydrogen on these nanotubes will be discussed.