▎ 摘　　要

Herein, reduced graphene oxide supported PtPd alloyed core-shell nanodendrites (Pt77Pd23 ACSNDs/rGO) were fabricated by a one-pot aqueous method with the biosynthesized polypeptide (colistin sulfate, CS) as the eco-friendly stabilizer and structure-director. The associated morphology, composition and structure were mainly investigated by a set of characterization techniques, and the synthesis mechanism was discussed in details. When compared with home-made Pt59Pd41 nanoparticles (NPs)/rGO, Pt89Pd11 NPs/rGO, Pt NPs/rGO, commercial Pt/C and Pd/C catalysts, the prepared nanocomposite exhibited comparable and/or even superior catalytic characters for glycerol oxidation reaction (GOR) with the higher mass activity (MA, 1533.49 mA mg(-1) metal) and specific activity (SA, 2.74 mA cm(-2) metal), and hydrogen evolution reaction (HER) with the lower onset potential (Eonset,-34 mV), smaller overpotential (57 mV) at 10 mA cm(-2) and Tafel slope (36 mV dec(-1)). (C) 2017 Elsevier B. V. All rights reserved.