▎ 摘　　要

An efficient oxygen evolving catalyst based on porous graphene film (PGF) and cobalt phosphate (Co-Pi) has been prepared by a convenient charge-controlled electrodeposition method. The Co-Pi@PGF is of high catalytic activity and stability towards water oxidation, superseding those of the Co-Pi planar film directly deposited on the electrode. (C) 2014 Elsevier B.V. All rights reserved.