Design and characterisation of a thin-layered dual-band electrochemical cell
Design and characterisation of a thin-layered dual-band electrochemical cell
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DOI：
10.1016/s0013-4686(02)00738-7
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发表时间：
2003-02
影响因子：
6.6
通讯作者：
T. Paixão;R. Matos;M. Bertotti
中科院分区：
文献类型：
--
作者：
T. Paixão;R. Matos;M. Bertotti
描述了在流动条件下运行的薄层双带电化学电池的开发。以铁氰化物为探针，研究了通道电极几何设计以及流速等实验参数对收集效率的影响，结果与文献预测一致。通过测量两个电极处的峰值电流和电荷值来评估通过将硫代硫酸盐+碘化物溶液注入载体电解质（1 M Ac-/1 M HAc）获得的图响应。数据显示了流速以及碘化物和硫代硫酸盐浓度之间的比率对在第一电极处记录的图谱的影响，并且根据样品分散度和反应层的厚度对结果进行了讨论。所提出的发生器-收集器电池的分析应用涉及用电产生的碘进行滴定，高精度测量低至 1 μM 的硫代硫酸盐浓度。
The development of a thin-layered dual-band electrochemical cell operating at flow conditions is described. Influence of experimental parameters related to the geometric design of the channel electrode as well as the flow rate on the collection efficiency were studied by using ferricyanide as a probe, results being in agreement with predictions from literature. Fiagram responses obtained by injecting thiosulphate+iodide solutions to the carrier electrolyte (1 M Ac−/1 M HAc) were evaluated by measuring peak current and charge values at both electrodes. Data showed the influence of the flow rate and the ratio between iodide and thiosulphate concentrations on the profile of fiagrams recorded at the first electrode and the results are discussed on the basis of both sample dispersion and thickness of the reaction layer. Analytical applications of the proposed generator–collector cell involved titrations with electrogenerated iodine, thiosulphate concentrations as low as 1 μM being measured with high precision.