A cobalt-based hybrid electrocatalyst derived from a carbon nanotube inserted metal–organic framework for efficient water-splitting

A Co-based hybrid electrocatalyst with a N-doped carbon nanoframe composed of hollow Co NPs interlinked by CNTs is synthesized by annealing CNT inserted ZIF-67. This resultant unique 3D hybrid with highly exposed active sites and good conductivity exhibits superior performance for overall water-splitting.