Properties of super-activated carbon coated with palladium for hydrogen storage

The hydrogen adsorption capacities of Pd and PdO supported high surface area activated carbons (HSACs) are respectively 2-3 and 4-5 times higher than pure HSACs. The reduction temperature and time for Pd HSACs, should be controlled at 125℃ for 2h, because metal particles of Pd dispersed on the surface of the activated carbon will agglomerate or move out of the pores of activated carbon at higher temperatures and longer times. Pd/HSACs and PdO/HSACs had high hydrogen saturated-adsorption capacity of 20 and (23mL/g) (respectively) at room temperature and ambient pressure, and 14 and 15.8mL/g respectively at 0℃ and ambient pressure. They exhibit mild adsorption/desorption conditions for hydrogen and a good adsorption-desorption (cycle) property.