SweepStat: A Build-It-Yourself, Two-Electrode Potentiostat for Macroelectrode and Ultramicroelectrode Studies,Journal of Chemical Education

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SweepStat: A Build-It-Yourself, Two-Electrode Potentiostat for Macroelectrode and Ultramicroelectrode Studies
Journal of Chemical Education ( IF 2.5 ) Pub Date : 2019-11-25 , DOI: 10.1021/acs.jchemed.9b00893
Matthew W. Glasscott ₁ , Matthew D. Verber ₁ , Jackson R. Hall ₁ , Andrew D. Pendergast ₁ , Collin J. McKinney ₁ , Jeffrey E. Dick _{1,

2}

Affiliation

Experimental electrochemistry offers unique opportunities for interactive instruction at all levels of education; however, widespread adoption in curricula is hindered by high costs associated with electrochemical instrumentation. Thus, the development of affordable instruments represents an essential step toward making electrochemistry accessible to everyone. While numerous commercially available three-electrode potentiostats exist, two-electrode potentiostats provide a simple and inexpensive alternative. Herein, we present the two-electrode SweepStat as a low-cost option capable of performing voltammetry and amperometry with comparable data acquisition to commercially available potentiostats valued from $4,000–40,000 USD. Additionally, the SweepStat’s design facilitates current measurements in the nanoampere regime, permitting experiments with ultramicroelectrodes (UMEs; r_electrode < 25 μm). The fabrication, programming, and testing of this device constitute a valuable experimental exercise at the intersection of circuit design and construction, computer programing, and electrochemical analysis. A set of simple electrochemical experiments are presented for both macroelectrodes and UMEs, highlighting key electrochemical techniques, equations, and concepts. Furthermore, finite element modeling and commercial potentiostat comparisons are used to verify the efficacy of the SweepStat platform. The open-source nature of the SweepStat coupled with the wealth of electrochemical techniques and experiments that can be implemented with a simple two-electrode circuit offers an unparalleled opportunity for electrochemical instruction with extensive method development driven by student research.

中文翻译：

SweepStat：自行构建的两电极恒电位仪，用于大电极和超微电极研究

实验电化学为各级教育中的互动式教学提供了独特的机会；然而，电化学仪器的高昂成本阻碍了课程的广泛采用。因此，开发负担得起的仪器代表了使所有人都可以使用电化学的重要一步。尽管存在许多可商购的三电极恒电位仪，但是两电极恒电位仪提供了一种简单且便宜的替代方案。本文中，我们介绍了一种双电极SweepStat，它是一种低成本的选件，能够执行伏安法和安培计，并能与价值4,000-40,000美元的市售恒电位仪进行类似的数据采集。此外，SweepStat的设计有助于在纳安级范围内进行电流测量，r_电极<25μm）。该器件的制造，编程和测试在电路设计和构造，计算机编程以及电化学分析的交叉点上构成了宝贵的实验练习。针对大型电极和UME，提供了一组简单的电化学实验，重点介绍了关键的电化学技术，方程式和概念。此外，有限元建模和商用恒电位仪比较用于验证SweepStat平台的功效。SweepStat的开放源代码性质以及可通过简单的两电极电路实施的大量电化学技术和实验，为电化学教学提供了无与伦比的机会，并通过学生研究推动了广泛的方法开发。

更新日期：2019-11-28

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