Electrochemical properties of ordered mesoporous carbon and its electroanalytical application for selective determination of dopamine
Electrochemical properties of ordered mesoporous carbon and its electroanalytical application for selective determination of dopamine
复制标题
有序介孔碳的电化学性质及其在多巴胺选择性测定中的电分析应用
DOI：
10.1016/j.elecom.2006.08.050
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发表时间：
2007-02-01
影响因子：
5.4
通讯作者：
Zhu, Longzhang
中科院分区：
文献类型：
--
作者：
Jia, Nengqin;Wang, Zhiyong;Zhu, Longzhang
研究了以SBA-15介孔二氧化硅材料为模板合成的一种新型碳材料有序介孔碳（OMC）的电化学性能以及OMC修饰电极对多巴胺（DA）和抗坏血酸（AA）氧化的电催化行为。使用循环伏安法评估OMC在5 mM K3Fe(CN)(6)/0.1 M KCl溶液中的电化学行为。与玻璃碳（GC）电极相比，OMC 显示出更快的电子转移速率。较高的电子转移动力学可归因于OMC材料中存在大量边缘平面缺陷位点，这一点已被拉曼光谱证实。循环伏安研究还表明OMC表面存在含氧官能团。此外，OMC 修饰电极对 DA 和 AA 的氧化表现出较高的电催化活性，并将它们的伏安响应解析为两个轮廓分明的峰，峰间距约为 1。 0.210 V。OMC修饰电极可有效用于AA存在下DA的选择性电化学测定。 (c) 2006 Elsevier B.V. 保留所有权利。
The electrochemical properties of one novel carbon material, ordered mesoporous carbons (OMC), synthesized by templating SBA-15 mesoporous silica materials and the electrocatalytic behaviors of OMC modified electrode towards the oxidation of dopamine (DA) and ascorbic acid (AA) were studied. Cyclic voltammetry was used to evaluate the electrochemical behaviors of OMC in 5 mM K3Fe(CN)(6)/ 0.1 M KCI solution. OMC showed a faster electron transfer rate, as compared with glass carbon (GC) electrode. The higher electron transfer kinetics can be attributed to the existence of a large amount of edge plane defect sites in the OMC materials, which was verified by Raman spectroscopy. The cyclic voltammetric studies also showed the presence of oxygen-containing functional groups on the surface of OMC. Furthermore, the OMC modified electrode showed high electrocatalytic activities toward the oxidation of DA and AA, and resolved their voltammetric responses into two well-defined peaks with peak separation of ca. 0.210 V. The OMC modified electrode could be effectively used for the selective electrochemical determination of DA in the presence of AA. (c) 2006 Elsevier B.V. All rights reserved.