Study on hydrogen storage mechanisms of mesoporous materials at low temperature and low pressure

MCM-48, metal doped MCM-48 and MCM-41 have been synthesized by hydrothermal method, respectively. The specific hydrogen storage amount of prepared materials at 77 K below 100 kPa are recorded in order to explore their hydrogen storage mechanisms. Experimental results indicate that pore size is the key factor that dominates their hydrogen storage capacity. Adsorption plays an important role from 0 to 35 kPa and mesoporous materials with smaller pore size seem to be better candidates for hydrogen storage. Diffusion will play a dominant role in the pressure range of 35-100 kPa, and mesoporous materials with larger pore size exhibit higher hydrogen storage capacity.