N-doped carbon nanotubes encapsulated with FeNi nanoparticles derived from defect-rich, molecule-doped 3D g-C3N4 as an efficient bifunctional electrocatalyst for rechargeable zinc–air batteries

The unique N-doped carbon nanotubes encapsulated with FeNi nanoparticles (FeNi/N-CNT) derived from defect-rich, molecule-doped 3D g-C 3 N 4 are reported. The as-obtained FeNi/N-CNT exhibits excellent bifunctional ORR and OER activities and stability.