Graphene supported Au-Pd bimetallic nanoparticles with core-shell structures and superior peroxidase-like activities

AucorePdshell (Au@Pd) bimetallic nanoparticles of sub-10 nm were successfully dispersed on graphene by a simple one step reducing method. The Au@Pd nanoparticles–graphene (Au@Pd–G) hybrids were characterized by high-resolution transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, energy X-ray spectroscopy and electronic energy loss spectroscopy. Evaluation of their catalytic performance demonstrates the Au@Pd–G hybrids have extraordinary peroxidase activity as catalysts.