Investigation of the mechanism of molecular hydrogen adsorption onto the electron-doped C60 - to realize the novel and efficient hydrogen storage -

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In order to develop highly efficient and practical hydrogen storage materials, we have investigated the geometrical and electronic structures as well as the hydrogen adsorption and desorption features of the electron-doped organic semiconductor molecules such as C_<60>. We find that hydrogen is adsorbed onto C_<60>/Cu(111) at room temperature apparently through a dissociation process and desorbed from it at about 150℃. It is proved that this material is promising for hydrogen storage. Further, we also examined alkali-deposited aromatic semiconductor monolayers and graphene adsorbed on metal surfaces as hydrogen storage materials.