New  efficient  hydrogen  storage  hybrids  were  fabricated  based  on  hydrogen  spillover  mechanism,
including chemisorptions and dissociation of H2  on the surface of LDH (layered double hydroxides)
and diffusion of H to rGO (reduced  graphene oxide). The structures and compositions of all of  the
hybrids (LDHs/rGO) have been verified using different methods including transmission electron micro-
scopy, X ray diffraction spectroscopy, infrared spectroscopy and BrunauereEmmetteTeller analysis. Then,
the abilities of the LDHs/rGOs, as hydrogen spillover, were investigated by electrochemical methods. In
addition, the LDHs/rGOs were decorated with palladium, using redox replacement process, and their
hydrogen spillover properties were studied. The results showed that the hydrogen adsorption/desorption
kinetics,   hydrogen   storage   capacities   and   stabilities   of   Pd #LDH/rGOs   are   better   than   Pd/rGO.
Finally presence of different polymers (synthesis with monomers, 4eaminophenol, 4eaminothiophenol,
o-phenylenediamine and p-phenylenediamine) at the surface of the Pd#LDH/rGOs on hydrogen storage
were studied. The results showed that presence of o-phenylenediamine and p-phenylenediamine im-
proves the kinetics of the hydrogen adsorption/desorption and increase the capacity of the hydrogen
storage.