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Electrodeposition of Copper Nano-clusters at a Platinum Microelectrode for Nitrate Determination

机译:用于硝酸盐测定的铂微电极上电沉积铜纳米团簇

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摘要

Copper nano-clusters were electrodeposited onto the platinum microelectrode by cyclic voltammetry method to fabricate an electrochemical sensor for nitrate determination. The material properties and morphologies of freshly deposited copper layer were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Compared with the microelectrode surface modified by fixed potential deposition method, the surface modified by cyclic voltammetry electrodeposition is porous and has a larger effective surface area. The reduction of nitrate under acidic conditions (pH=2) was characterized by linear sweep voltammetry. The preliminary experimental results reveal that the microelectrode modified by cyclic voltammetry electrodeposition had higher sensitivity of 22.56 μA/mmol for nitrate detection within the concentration range from 0.1mmolL~(-1) to 4mmolL~(-1).
机译:通过循环伏安法将铜纳米团簇电沉积在铂微电极上,以制备用于硝酸盐测定的电化学传感器。通过X射线衍射(XRD)和扫描电子显微镜(SEM)分别表征了新沉积的铜层的材料性能和形貌。与通过固定电位沉积法修饰的微电极表面相比,通过循环伏安法电沉积修饰的表面是多孔的并且具有较大的有效表面积。通过线性扫描伏安法表征了在酸性条件下(pH = 2)硝酸盐的还原。初步的实验结果表明,在0.1mmolL〜(-1)〜4mmolL〜(-1)的浓度范围内,循环伏安电沉积修饰的微电极对硝酸盐的检测灵敏度更高,为22.56μA/ mmol。

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