Three-dimensional interconnected network of nanoporous CoP nanowires as an efficient hydrogen evolution cathode.

For the first time we demonstrate the topotactic synthesis of a three-dimensional (3D) interconnected network of nanoporous CoP nanowires directly on a Ti substrate (np-CoP NWs/Ti) via low-temperature phosphidation of a Co-2(OH)(2)(CO3)(2)/Ti precursor and its further use as a highly efficient hydrogen evolution cathode.