摘要：

Gold nanoparticles (AuNPs)have special electrocatalytic performance.In this paper,AuNPs were prepared by wa-ter/AOT/cyclohexane microemulsion system.AuNPs of different sizes were prepared by changing the molar ratio of water to AOT (ω).The morphology and size,ultraviolet absorption spectrum and electrochemical properties of AuNPs were analyzed and studied by transmission electron microscope (TEM),ultraviolet spectrophotometer and electro-chemical workstation.The result showed that AuNPs were spherical,with size uniformity and good monodispersity.The test of electrocatalytic hydrogen analysis on AuNPs showed that AuNPs had a good dispersion with a homogeneous solution.The electrocatalytic activity of AuNPs was not as good as Pt/C electrode,but better than that of silver nanoparticles,gold-iron nano-alloy and nano-tungsten selenide,which indicated that the AuNPs had better electrocatalytic performance.This laid the theory foundation of AuNPs in bioelectricity catalytic application.%纳米金具有特殊的电催化性能.采用水/AOT(2-乙基己基琥珀酸酯磺酸钠)/环己烷微乳体系制备纳米金颗粒,通过改变水与 AOT的物质的量比(ω)制备不同尺寸的纳米金,并通过透射电镜,紫外分光光度计,电化学工作站对纳米金颗粒的形貌尺寸,紫外吸收光谱,电化学性能进行分析与研究.结果表明,纳米金呈球形,尺寸均一,单分散性较好.通过对纳米金颗粒电催化析氢性能的测试发现,纳米金粒子分散性较好,形成的是均相溶液,纳米金粒子与 Pt/C 相比电催化性能稍弱,但是与纳米银,金铁合金和纳米硒化钨相比都显现出较好的电催化活性,说明纳米金粒子具有比较优良的电催化性能,为纳米金颗粒在生物电催化领域的应用奠定理论基础.

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