Two-dimensional graphene-like N, Co-codoped carbon nanosheets derived from ZIF-67 polyhedrons for efficient oxygen reduction reactions

Two-dimensional graphene-like N, Co-codoped carbon nanosheets (N, Co-CNSs), which exhibit excellent stability, competitive catalytic activity and superior methanol tolerance compared to the commercial Pt/C catalyst, have been successfully fabricated using Co-based zeolitic imidazolate framework (ZIF-67) polyhedrons as precursors in a molten salt medium.