The punctured droplet electrode – A new three-phase electrode with well defined geometry
The punctured droplet electrode – A new three-phase electrode with well defined geometry
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刺穿液滴电极——一种具有明确几何形状的新型三相电极
DOI：
10.1016/j.elecom.2006.09.032
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发表时间：
2007
影响因子：
5.4
通讯作者：
F. Scholz
中科院分区：
文献类型：
--
作者：
E. Bąk;M. Donten;Z. Stojek;F. Scholz
新的三相电极可以对明确的三相结进行详细研究。它由大小控制良好的硝基苯滴组成。液滴从毛细管中分配并用微圆柱电极刺穿。有机液体含有电活性化合物（十甲基二茂铁），并且重要的是不含支持电解质。水相可以含有各种盐。获得了十甲基二茂铁氧化的明确且可重复的线性扫描和方波伏安图以及计时安培图。由十甲基二茂铁的方波伏安图确定的形式电势与水相中存在的阴离子转移的标准电势的依赖性几乎是完全线性的。所开发的方法允许在一个小液滴内形成两个或多个三相边界。由于液滴充分暴露，这种电极几何形状还提供了对有机相中的反应产物进行光学/分光光度检查以及对反应层生长进行检查的潜在可能性。
A new three-phase electrode allows detailed studies on well-defined three-phase junctions. It consists of a nitrobenzene drop of well controlled size. The drop is dispensed from a capillary and is punctured with a microcylinder electrode. The organic liquid contains an electroactive compound (decamethylferrocene) and, importantly, no supporting electrolyte. The aqueous phase may contain various salts. Well-defined and reproducible linear-scan and square-wave voltammograms and chronoamperograms of oxidation of decamethylferrocene were obtained. The dependence of the formal potential determined from the square-wave voltammograms of decamethylferrocene versus the standard potential of transfer of anions present in the aqueous phase was almost perfectly linear. The developed approach allows the formation of two or more three-phase boundaries within one small drop. Since the drop is well exposed, this electrode geometry also gives a potential possibility of optical/spectrophotometric inspection of the reaction products in the organic phase and of examination of the reaction-layer growth.