Abstract

An electrode for monoethylene glycol analysis was developed based on the modification of the surface of the glassy carbon electrode with electrochemically reduced graphene oxide and gold and palladium nanoparticles (GCE/rGO/AuPd-np). Its analytical performance was assessed by determining some analytical figures of merit. Graphene oxide was reduced electrochemically as well as the metal particles with gold deposited by chronopotentiometry and palladium by cyclic voltammetry (CV). The electrode was characterized by MET, TEM and EDS techniques. The study of alcohol behaviour was performed electrochemically using CV technique. The positive synergistic effect of metals provided greater electrocatalytic response, stability and resistance to poisoning. The GCE/rGO/AuPd-np sensor presented a detection limit equal to 31.48 µmol l^–1 for a linear range of 89.5–179 µmol l^–1 with a linear correlation coefficient of 0.9096 and high stability, not losing response even after 650 cycles.

Graphic abstract

中文翻译：

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使用 rGO/AuPd-np 修饰的玻碳电极对单乙二醇进行电化学分析

摘要

基于用电化学还原的氧化石墨烯和金和钯纳米粒子 (GCE/rGO/AuPd-np) 修饰玻碳电极的表面，开发了一种用于单乙二醇分析的电极。它的分析性能是通过确定一些分析品质因数来评估的。氧化石墨烯以及通过计时电位法沉积的金和通过循环伏安法 (CV) 沉积钯的金属颗粒被电化学还原。电极通过MET、TEM和EDS技术表征。酒精行为的研究是使用 CV 技术以电化学方式进行的。金属的积极协同效应提供了更大的电催化反应、稳定性和抗中毒能力。GCE/rGO/AuPd-np 传感器的检测限等于 31.48 µmol l ^–1线性范围为 89.5–179 µmol l ^–1，线性相关系数为 0.9096，稳定性高，即使在 650 次循环后也不会失去响应。

图形摘要