Hydrogen Storage Capacity in Ni/Pd@f-MWCNTS Decorated Graphene Oxide/Cu-BTC Composites at Room Temperatures

Abstract

Hydrogen is considered to be one of the renewable and cleanest energy source and most probable successor of conventional petroleum fuels. Hydrogen storage in nanoporous materials has been attracting a great deal of attention in recent years. The addition of carbon materials such as graphene oxides (GOs) and carbon nanotubes (CNTs) into MOFs can improve the physicochemical properties of parent MOFs with excellent chemical, mechanical and distinguished electronic thermal robustness. The decoration of the surface of graphene by metal could greatly facilitate the hydrogen storage. In the current study, the parent materials and their composites synthesized have been characterized by powder x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and gas adsorption isotherms. The composite systems, GO/Cu-BTC/Ni@f-MWCNTs and GO/Cu-BTC/Pd@f-MWCNTs reached a hydrogen storage capacity of 3.91 and 4.21 wt. % at 77 K and 1.23 and 1.71% at 298 K.