AbstractA high-performance electrochemical H2O2 sensor was prepared by constructing multiple interfaces using platinum nanoparticles (Pt NPs), ferumoxytol (Fer) and reduced graphene oxide (rGO) on a glassy carbon electrode (GCE). The morphology of Fer/rGO and Fer/rGO-Pt was characterized by field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy. Cyclic voltammetry and chronoamperometry were adopted to characterize the electrochemical properties of the sensor. Because of the synergistic catalytic effect of the compositions (rGO, Fer and Pt NPs) on the multiple interfaces, the sensor exhibits particularly high electrocatalytic activity toward the reduction of H2O2 with a low detection limit (~0.38 μM), a linear range (0.0004–0.01, 0.0075–4.3 and 4.9–10.8 mM), and a high sensitivity (340 μA mM−1 cm−2, n = 4) operated at a typical working voltage of +0.1 V (vs. Ag/AgCl). The electrode is selective and long-term stable. It was successfully applied to the determination of H2O2 in (spiked) milk samples. Graphical abstractSchematic presentation of an electrochemical H2O2 sensor using platinum nanoparticles (Pt NPs), ferumoxytol (Fer) and reduced graphene oxide (rGO) nanocomposites modified glassy carbon electrode (GCE). The sensor was applied to the determination of H2O2 in (spiked) milk samples.

中文翻译：

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使用由 ferumoxytol 和用铂纳米粒子装饰的还原氧化石墨烯制备的纳米复合材料修饰的玻碳电极的电流型过氧化氢传感器

摘要 通过在玻碳电极 (GCE) 上使用铂纳米粒子 (Pt NPs)、ferumoxytol (Fer) 和还原氧化石墨烯 (rGO) 构建多个界面，制备了一种高性能电化学 H2O2 传感器。Fer/rGO 和 Fer/rGO-Pt 的形貌通过场发射扫描电子显微镜和能量色散 X 射线光谱表征。采用循环伏安法和计时电流法来表征传感器的电化学性能。由于组合物（rGO、Fer 和 Pt NPs）在多个界面上的协同催化作用，传感器对 H2O2 的还原表现出特别高的电催化活性，检测限低（~0.38 μM），线性范围（0.0004 –0.01、0.0075–4.3 和 4.9–10.8 mM）和高灵敏度（340 μA mM-1 cm-2，n = 4) 在 +0.1 V（相对于 Ag/AgCl）的典型工作电压下运行。电极具有选择性且长期稳定。它已成功应用于（加标）牛奶样品中 H2O2 的测定。图形摘要使用铂纳米粒子 (Pt NPs)、ferumoxytol (Fer) 和还原氧化石墨烯 (rGO) 纳米复合材料修饰玻碳电极 (GCE) 的电化学 H2O2 传感器的示意图。该传感器用于测定（加标）牛奶样品中的 H2O2。ferumoxytol (Fer) 和还原氧化石墨烯 (rGO) 纳米复合材料修饰玻碳电极 (GCE)。该传感器用于测定（加标）牛奶样品中的 H2O2。ferumoxytol (Fer) 和还原氧化石墨烯 (rGO) 纳米复合材料修饰玻碳电极 (GCE)。该传感器用于测定（加标）牛奶样品中的 H2O2。