A　green　synthesis　of　Pt-on-Pd　bimetallic　nanodendrites　supported　on　graphene　(GPtPdNDs)　with　a　Pd　interior　and　a　dendrite-like　Pt　exterior　was　achieved　using　a　two-step　preparation,　mixing　graphene　and　PdCl42-　first,　then　adding　PtCl42-　and　ethanol　without　any　other　solvent.　The　morphology,　structure　and　composition　of　the　thus-prepared　GPtPdNDs　were　characterized　by　transmission　electron　microscopy　(TEM),　high　resolution　TEM,　energy-dispersive　X-ray　spectroscopy　and　X-ray　photoelectron　spectroscopy.　Because　no　halide　ions　(refer　in　particular　to　Br-,　I-)　or　surfactant　was　involved　in　the　synthesis,　the　prepared　GPtPdNDs　were　directly　modified　onto　a　glassy　carbon　electrode　and　showed　excellent　electrocatalytic　performance　in　methanol　oxidation　without　any　pretreatments.　Moreover,　with　the　special　structure　of　PtPdNDs　and　the　synergetic　effects　of　Pt　and　Pd　and　the　enhanced　electron　transfer　by　graphene,　the　GPtPdNDs　composites　exhibited　higher　electrocatalytic　activity　and　better　tolerance　to　Pt　nanoparticles　supported　on　graphene　(GPtNPs)　and　Pt/C　for　methanol　oxidation.　(c)　2014　Elsevier　Ltd.　All　rights　reserved.