A combined μ-mercury reference electrode/Au counter-electrode system for microelectrochemical applications
A combined μ-mercury reference electrode/Au counter-electrode system for microelectrochemical applications
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DOI：
10.1007/s10008-006-0158-3
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发表时间：
2006-11-01
影响因子：
2.5
通讯作者：
Hassel, Achim Walter
中科院分区：
文献类型：
--
作者：
Lill, Kirsten Agnes;Hassel, Achim Walter
根据琼脂基钼参比电极的概念，发展了不同类型的汞基钼参比电极(Hg/Hg2SO4/Na2SO4，Hg/Hg2SO4/Na2SO4，Hg/Hg2SO4/NaCOOCH3)。汞被电化学沉积到一根金丝上，形成汞齐。相应的汞盐在表面电化学生成。该电极可以插入填充了所需电解液的毛细管中。为了简化该Mu参比电极的操作，减少扩散和避免泄漏，用琼脂固定电解液。参比电极毛细管外表面有一层250 nm厚的金层作为对电极。通过微极化曲线、交流阻抗谱、暂态电位和循环伏安等测试手段对参比电极和对电极的电化学行为进行了表征。
Different types of mercury-based mu-reference electrodes (Hg/Hg2SO4/Na2SO4, Hg/Hg-2(CH3COO)(2)/NaCOOCH3) have been developed following the concept of agar-based mu-reference electrodes. Mercury was electrochemically deposited onto a gold wire to form an amalgam. The corresponding mercury salt was formed electrochemically at the surface. This electrode can be inserted into a capillary that is filled with the electrolyte of interest. To simplify the handling of this mu-reference electrode, to reduce diffusion and to avoid leakage, the electrolyte was immobilised with agar. A 250-nm-thick gold layer on the outer surface of the capillary of the reference electrode served as counter-electrode. The electrochemical behaviour of reference electrodes and counter-electrodes were proven by micro-polarisation curves, electrochemical impedance spectroscopy, potential transients and cyclic voltammetry.