Optimization of biomass-based carbon materials for hydrogen storage

摘要: Five biomass-based carbon samples have been successfully prepared through KOH activation procedure. The microstructure of the materials was tuned by varying KOH/precursor weight ratio from 1:1 to 5:1, in order optimize their hydrogen storage behavior and clarify mechanism. A careful physic-chemical characterization sample (N 2 CO adsorption, X-ray diffraction, electron microscopy observations) showed that increasing nature carbons changes microporous micro-mesoporous. Thus, an increase surface area observed which enhanced H sorption capacity when high pressures were adopted (25–200 bar). At subatmospheric pressure, role active sites for located oriented graphene sheets, clearly elaborated. Finally, optimal has shown a 6wt% 1.22 wt% at −196°C 25°C respectively, 200 bar. These results make promising application.