Cu₂O/NiO_x/graphene oxide modified glassy carbon electrode for the enhanced electrochemical oxidation of reduced glutathione and nonenzyme glucose sensor

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• 作者：Baiqing Yuan^a ; ^{baiqingyuan1981@126.com} ; Chunying Xu^a ; Lin Liu^a ; Qingqing Zhang^a ; Suqian Ji^a ; Liping Pi^a ; Daojun Zhang^a ; ^b ; ^{zhangdj0410@gmail.com} ; Qisheng Huo^b
• 关键词：Cuprous oxide ; Nickel oxide ; Graphene oxide ; Glutathione ; Glucose sensor
• 刊名：Electrochimica Acta
• 出版年：2013
• 出版时间：1 August, 2013
• 年：2013
• 卷：104
• 期：Complete
• 页码：78-83
• 全文大小：2475 K

文摘

A Cu₂O/NiO_x/graphene oxide (GO) modified glassy carbon electrode (GC) was prepared by electrodeposition successively. In this layer-by-layer structure, monodisperse and uniform spherical or octahedral Cu₂O could be synthesized by controlling the electrodeposition potential, and three-dimensional NiO_x nanoparticles was electrodeposited on the surface of GO. The presented electrode exhibited high elctrocatalytic activity toward the oxidation of reduced glutathione (GSH) and glucose due to the synergistic effect of Cu₂O and NiO_x, which was applied in the electrochemical determination of GSH at physiological pH and nonenzyme glucose sensor. The results showed that, with the co-effect of three-dimensional NiO_x nanoparticles, spherical Cu₂O demonstrated much higher electrocatalytic activity than octahedral Cu₂O. In addition, interference from the oxidation of common interfering species can be avoided.