Synthesis of PtAu bimetallic nanoparticles on graphene-carbon nanotube hybrid nanomaterials for nonenzymatic hydrogen peroxide sensor

► PtAu bimetallic NPs were synthesized on G-CNTs via chemical co-reduction method. ► PtAu/G-CNTs/GCE greatly enhanced the electrochemical response of H2O2. ► H2O2 can be detected with wide linear range and a low detection limit. ► The sensor showed good selectivity, long-term stability and reproducibility.