Two-dimensional black phosphorus nanoflakes: A coreactant-free electrochemiluminescence luminophors for selective Pb2+ detection based on resonance energy transfer

•a coreactant-free electrochemiluminescence sensing platform was developed.•2D black phosphorus nanoflakes were exploited as new luminophores.•Ag/AgCl nanocubes were prepared as electrochemiluminescence acceptor.•electrochemiluminescence resonance energy transfer system was presented.