Periasamy Vengadesh, Elumalai Prince Nishchal Narayanaswamy, Talebi Sara, Subramaniam Ramesh T, Kasi Ramesh, Iwamoto Mitsumasa, Gnana Kumar Georgepeter
Low Dimensional Materials Research Centre (LDMRC), Department of Physics, Faculty of Science, Universiti Malaya 50603 Kuala Lumpur Malaysia
eProfiler Solutions Malaysia Sdn Bhd, Suite 3.5, Level 3, UM Innovation Incubator Complex, Universiti Malaya 50603 Kuala Lumpur Malaysia.
RSC Adv. 2023 Feb 15;13(9):5744-5752. doi: 10.1039/d3ra00457k. eCollection 2023 Feb 14.
Conventional three-electrode systems used in electrochemical measurement demand time-consuming and maintenance intensive procedures to enable accurate and repeatable electrochemical measurements. Traditionally, different metal configurations are used to establish the electrochemical gradient required to acquire the redox activity, and vary between different electrochemical measurement platforms. However, in this work, we report using the same metal (gold) for the counter, working and reference electrodes fabricated on a miniaturized printed circuit board (PCB) for a much simpler design. Potassium ferricyanide, widely used as a redox probe for electrochemical characterization, was utilized to acquire cyclic voltametric profiles using both the printed circuit board-based gold-gold-gold three-electrode and conventional three-electrode systems (glassy carbon electrode or graphite foil as the working electrode, platinum wire as the counter electrode, and Ag/AgCl as the reference electrode). The results show that both types of electrode systems generated similar cyclic voltammograms within the same potential window (-0.5 to +0.7 V). However, the novel PCB-based same-metal three-electrode electrochemical cell only required a few activation cycles and exhibited impressive cyclic voltametric repeatability with higher redox sensitivity and detection window, while using only trace amounts of solutions/analytes.
电化学测量中使用的传统三电极系统需要耗时且维护密集的程序才能实现准确且可重复的电化学测量。传统上，使用不同的金属配置来建立获取氧化还原活性所需的电化学梯度，并且在不同的电化学测量平台之间有所不同。然而，在这项工作中，我们报告了在小型印刷电路板（PCB）上制造的对电极、工作电极和参比电极均使用相同的金属（金），从而实现更简单的设计。铁氰化钾被广泛用作电化学表征的氧化还原探针，利用基于印刷电路板的金-金-金三电极系统和传统三电极系统（玻碳电极或石墨箔作为工作电极，铂丝作为对电极，Ag/AgCl作为参比电极）来获取循环伏安曲线。结果表明，在相同的电位窗口（-0.5至+0.7V）内，两种类型的电极系统都产生了相似的循环伏安图。然而，新型的基于印刷电路板的同金属三电极电化学池只需要几个活化循环，并且在仅使用痕量溶液/分析物的情况下，表现出令人印象深刻的循环伏安重复性，具有更高的氧化还原灵敏度和检测窗口。
