Electrochemical characterization of commercial and home-made screen-printed carbon electrodes
Electrochemical characterization of commercial and home-made screen-printed carbon electrodes
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DOI：
10.1081/al-120023627
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发表时间：
2003-01-01
影响因子：
2
通讯作者：
Smyth, MR
中科院分区：
文献类型：
--
作者：
Morrin, A;Killard, AJ;Smyth, MR
丝网印刷技术被广泛应用于一次性电化学传感器的大规模生产。尽管人们对电极反应的性质知之甚少，但碳丝网印刷电极的实用价值已经得到了开发。(Wang，J.；Pedrero，M.；Sakslumd，H.；Hammerich，O.；Pingarron，J.丝网印刷碳带的电化学活化。The Analyst 1996,121(3)，345-350)。考虑到碳电极的一般复杂性，以及商业碳墨水组成的差异，出现了这样的问题：这种差异和复杂性如何影响它们的电化学反应能力。这项工作的目的是比较商业电极和由不同商业油墨制成的内部电极的电活性，以找到最适合安培传感器工作的电极。分析方法包括循环伏安法、安培法和线性扫描伏安法。研究发现，商业工作电极由于其较差的电荷转移性能，不适合大电流的工作。内部电极具有较小的电阻特性，更适合于大电流安培传感。利用这种电极结构，选择了最优的碳糊作为工作电极。
Screen-printing technology is widely used for the mass-production of disposable electrochemical sensors. The practical utility of carbon screen-printed electrodes has been exploited, despite the fact that little is known about the nature of the electrode reactions. (Wang, J.; Pedrero, M.; Sakslumd, H.; Hammerich, O.; Pingarron, J. Electrochemical activation of screenprinted carbon strips. The Analyst 1996, 121 (3), 345-350). Given the complexity of carbon electrodes in general, and differences in the composition of commercial carbon inks, the question arises as to how such differences and complexity affect their electrochemical reactivity. The aim of this work was to compare the electroactivity of both commercial electrodes and electrodes fabricated in-house from various commercial inks, in order to find the electrode most suited to amperometric sensor work. Methods of analysis include cyclic voltammetry, amperometry and linear sweep voltammetry. It was found that the commercial working electrodes were not suited to the high current work of interest, due to their poor charge transfer properties. The in-house electrode had less resistive properties, and was more suited for high current amperometric sensing. Utilizing this electrode configuration, an optimal carbon paste was chosen for the working electrode.