In-situ hydrogen production and storage in (0 0 2) oriented TiO2 thin films

TiO2 thin film with high energy surface (0 0 2) facet shows high photocatalytic activity for H2 production, as well as in-situ H2 storage. Theoretical calculation reveals that the high energy barrier of the (1 1 0) surface restricts H2 in the lattice. The theoretical hydrogen storage capacity is up to 1.2% at ambient condition.