Preparation of nanoporous graphene for hydrogen adsorption

In this study, nanoporous graphene was synthesized to investigate hydrogen adsorption capacity at different pressures (0-34 bar) at room temperature (298 K). Nanoporous graphene was prepared by chemical vapor deposition (CVD) method, using CH4 as a carbon source at a temperature of 900 °C over nickel oxide nanocatalyst. The nickel oxide nanocatalyst was prepared by sol-gel method.The product was characterized by X-ray diffraction (XRD), Raman spectroscopy, field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier transform infrared spectra (FT-IR) as well as BET measurement. The adsorption of hydrogen was done by volumetric method. High adsorption capacity (2.56 wt%) was achieved in nanoporous graphene due to its high pore volume (2.11 cm3/g) and large specific surface area (850 m2/g).

Keywords:

Hydrogen adsorption , nanoporous graphene