Thermoanalytical investigations of hydrogen adsorption on carbon materials

The hydrogen adsorption on carbon nanofibers of different origin was investigated by thermogravimetric measurements at temperatures between −10 and 25 °C and pressures up to 140 bar. The applied gravimetric apparatus yields a distinctly higher precision, compared to volumetric and calorimetric methods. All investigated carbon nanofibers show a hydrogen uptake below 0.3 wt.% independently from sample pretreatment.