AbstractGold nanoparticles (AuNP) were deposited on the surface of multiwalled carbon nanotubes (MWCNT) by in-situ thermal decomposition of gold acetate under solvent and reducing agent free conditions to obtain a nanohybrid of AuNP-MWCNT. A glassy carbon electrode (GCE) was then modified with the nanohybrid and used for amperometric determination of hydrazine. The modified GCE showed an improved electrocatalytic effect towards hydrazine oxidation at a working potential of about 0.30 V (vs Ag|AgCl,KClsat). The calibration plot for hydrazine is linear in two concentration ranges, viz. from 0.1–100 μM and 0.2–1 mM. The respective sensitivities are 4.98 and 4.00 μA μM−1cm−2, and the limit of detection (at S/N = 3) is about 30 nM. Graphical abstractSchematic presentation of the electrocatalytic oxidation of hydrazine using a glassy carbon electrode modified with gold nanoparticle-decorated multiwalled carbon nanotubes at the potential of 0.303 V vs. Ag|AgCl, KClsat. This modified electrode shows high sensitivity and low detection limit by hydrodynamic amperometry.

中文翻译：

---

使用金纳米粒子修饰的多壁碳纳米管修饰的玻碳电极的电流型肼传感器

摘要 通过乙酸金在无溶剂和无还原剂条件下的原位热分解，将金纳米粒子（AuNP）沉积在多壁碳纳米管（MWCNT）的表面，获得了 AuNP-MWCNT 的纳米杂化物。然后用纳米杂化物修饰玻碳电极（GCE）并用于肼的电流测定。改性 GCE 在约 0.30 V（相对于 Ag|AgCl,KClsat）的工作电位下显示出对肼氧化的改进电催化效果。肼的校准曲线在两个浓度范围内呈线性，即。从 0.1–100 μM 和 0.2–1 mM。各自的灵敏度分别为 4.98 和 4.00 μA μM-1cm-2，检测限（S/N = 3）约为 30 nM。图形摘要在 0.303 V vs. Ag|AgCl、KClsat 电位下，使用金纳米粒子装饰的多壁碳纳米管修饰的玻璃碳电极对肼进行电催化氧化的示意图。这种改良的电极显示出高灵敏度和低检测限的流体动力学电流法。