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Kelly, R.G., Yuan, J., Jones, S.H., Blanke, W., Aylor, J.H., Wan, W., Batson, A.P., Wintenbergand, A. and Clemefia, G.G. (1997) Proceedings of CORROSION 97, NACE International, Paper No. 294.

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• TITLE: A Simplified Microcontroller Based Potentiostat for Low-Resource Applications

  AUTHORS: Bolaji Aremo, Mosobalaje Oyebamiji Adeoye, Imoh Bassey Obioh, Odunayo Adetola Adeboye

  KEYWORDS: Potentiostat, Voltammogram, Microcontroller, Randles-Sevcik, Scan Rate

  JOURNAL NAME: Open Journal of Metal, Vol.5 No.4, January 29, 2016

  ABSTRACT: A low component count, microcontroller-based potentiostat circuit was developed through the use of operational amplifiers arranged in different feedback configurations. This was developed to alleviate the cost burden of equipment procurement in low-cost and budget applications. Simplicity was achieved in the design by the use of the microcontroller’s native functionalities and a low-cost R/2R resistor ladder digital-to-analogue converter. The potentiostat was used to investigate the Ni2+/Ni(s) redox couple in a 3-electrode cell with a silver/silver chloride reference electrode and graphite counter and working electrodes. Linear sweep voltammograms were ob-tained at scan rates of 10, 20, 30 and 40 mV/s. The analysis of the peak current versus (scan rate)1/2 plot indicated that the Ni2+/Ni(s) reduction, though conforming to the Randles-Sevcik equation, was a non-reversible redox reaction.a