A Simplified Microcontroller Based Potentiostat for Low-Resource Applications  

作　　者：Bolaji Aremo Mosobalaje Oyebamiji Adeoye Imoh Bassey Obioh Odunayo Adetola Adeboye 

机构地区：[1]Department of Materials Science and Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria [2]Centre for Energy Research and Development, Obafemi Awolowo University, Ile-Ife, Nigeria [3]Department of Agricultural Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria

出　　处：《Open Journal of Metal》2015年第4期37-46,共10页金属学报（美国）

摘　　要：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 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

关 键 词：POTENTIOSTAT VOLTAMMOGRAM MICROCONTROLLER Randles-Sevcik SCAN Rate 

分 类 号：O6[理学—化学]