▎ 摘　　要

In this study, gold nanoparticles were modified on graphene surface to form the graphene-gold composites by one-pot reaction in aqueous solution. Electrochemical measurements indicated that the modification of the composites on electrode could efficiently enhance the voltammetric response. Moreover, our results also indicated that the electrocatalytic oxidation of ammonia could be observed on the graphene -gold composites modified glassy carbon electrode. (C) 2013 The Electrochemical Society. [DOI:10.1149/2.005303ssl] All rights reserved.