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首页> 外文期刊>International Journal of Electrochemical Science >Sensitive Electrochemical Determination Uric Acid at Pt Nanoparticles Decorated Graphene Composites in the Presence of Dopamine and Ascorbic Acid
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Sensitive Electrochemical Determination Uric Acid at Pt Nanoparticles Decorated Graphene Composites in the Presence of Dopamine and Ascorbic Acid

机译：多巴胺和抗坏血酸存在下Pt纳米粒子修饰石墨烯复合材料的灵敏电化学测定

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摘要

In this paper, the composites of Pt nanoparticles and graphene (PtNPs/GR) were prepared by one-stepelectrochemical reduction technique, and then were used as modified materials for electrochemicaldetermination of uric acid (UA) in the presence of dopamine (DA) and ascorbic acid (AA). Cyclicvoltammetry (CV) and differential pulse voltammetry (DPV) methods were employed to study theirelectrocatalytic activity toward the oxidation of UA in the presence of DA and AA. It showedPtNPs/GR modified electrode displayed good electrocatalytic activity toward UA, which can beascribed to the synergistic effect between the high conductivity and large surface area of GR and thehigh catalytic activity of PtNPs. The anodic peak current was linear to the concentration of UA in therange from 0.5 M to 180 M, and the detection limits was 0.22 M (S/N = 3). Moreover, the preparedelectrode displayed highly selectivity, good stability and reproducibility.
机译：本文采用一步电化学还原技术制备了Pt纳米颗粒与石墨烯的复合材料（PtNPs / GR），并作为多巴胺（DA）和抗坏血酸存在下电化学测定尿酸（UA）的改性材料。酸（AA）。采用循环伏安法（CV）和微分脉冲伏安法（DPV）研究在DA和AA存在下它们对UA氧化的电催化活性。结果表明，PtNPs / GR修饰电极对UA具有良好的电催化活性，这可归因于GR的高电导率和大表面积与PtNPs的高催化活性之间的协同作用。阳极峰值电流与UA浓度在0.5 M至180 M之间呈线性关系，检测极限为0.22 M（S / N = 3）。此外，所制备的电极显示出高选择性，良好的稳定性和可再现性。

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