Implementación de un potenciostato y de un nuevo software para el control y visualización de señales eléctricas generadas en experimentos electroquímicos

Abstract

This project presents the construction and implementation of a potentiostat for controlling and displaying electrical signals generated in electrochemical experiments using a three-electrode cell. It was necessary to develop a new software that allows measuring, treating and controlling electronic signals; as well as a man-machine interface that allows visualizing the resulting graphs of the experiments. The project consists of three main parts: the hardware construction, the development and implementation of the STM32F407VG card software and the design of a man-machine interface. The hardware is composed by stages of signals conditioning and filtering that allow to send to the cell's electrodes the voltage signal generated by the STM32F407VG card. The electrochemical techniques implemented are the cyclic voltammetry and the chronoamperometry. Electrochemical experiments graphs are used to determinate the type of solution, concentration, and times spread, among other properties. Trained laboratory personnel with expertise in electrochemical analysis do the graph analysis.