▎ 摘　　要

A new idea for hydrogen storage is proposed in which H+ ions are adsorbed chemically on graphene sheet and it is possible to overcome the fundamental problem of current methods that hydrogen is not able to reversibly adsorbed/desorbed in appropriate temperature and under moderate pressure. As the top priority to test the feasibility. H+ ions storing capacity is studied by theoretical calculations. And the bonding and structural properties of H+/graphene complexes are investigated thoroughly. Our data yield promising results. The graphene fragment C62H20, in a quasi one-dimensional arch-like tunnel geometry, can absorb up to 54 H+ ions on the same side (6.6 wt.% H-2) while maintaining its conductivity because of the sp(2)-rich structure. The feasibility of the new idea is proved from a viewpoint of hydrogen storing capacity. Additional calculation using an infinite graphene sheet model gives credibility to our conclusions. Considering the successful development of synthesis techniques in mass-producing atom-thick graphene sheets, it is really worth expecting a hydrogen-based energy economy can be realized by hydrogen-ion storage graphene electrodes. (C) 2011 Elsevier B.V. All rights reserved.