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利用Keggin结构的12-硅钨酸作为模板,采用水浴法还原硝酸钯制备了纳米钯。用透射电子显微镜(TEM)和X射线衍射(XRD)等手段对制备的钯纳米颗粒的形貌、粒径大小和结构进行了表征。利用滴涂法将Pd纳米颗粒修饰到Au电极表面,通过循环伏安法,研究了纳米Pd对肼的电催化性质。结果显示,制备的纳米钯为3～4 nm的类球形颗粒,为面心立方结构。纳米Pd修饰电极对肼具有良好的电催化氧化作用。在pH=6时,氧化峰电流(Ipa)与肼的浓度呈现良好的线性关系。
Nanometer palladium was prepared by using 12-silicotungstic acid with Keggin structure as a template and palladium nitrate reduction by water bath method. The morphology, particle size and structure of the prepared Pd nanoparticles were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Pd nanoparticle was modified to the Au electrode surface by drop-coating method. The electrocatalytic property of Pd on hydrazine was studied by cyclic voltammetry. The results show that the prepared nano-Pd is spherical particle with 3 ~ 4 nm, which is face-centered cubic structure. The nano-Pd modified electrode has good electrocatalytic oxidation of hydrazine. At pH = 6, the oxidation peak current (Ipa) showed a good linear relationship with the hydrazine concentration.