Facile precursor-mediated synthesis of porous core–shell-type Co3O4 octahedra with large surface area for photochemical water oxidation

A porous Co3O4 material with unique octahedron-in-octahedron core–shell-type morphology is prepared via a facile precursor-mediated synthetic route. This material possesses large surface area and good catalytic activity for water oxidation reaction.