Instrumentação para aplicação de campo magnético em ensaios de eletrocatálise: modelagem, desenvolvimento e comissionamento

Abstract

This work aimed to develop an instrumentation for the application of an oriented magnetic field, using NdFeB permanent magnets, to be applied in electrocatalysis experiments. The instrumentation modeling, development and commissioning processes were described in detail. The research emerged from a collaboration with an ongoing postdoctoral research project withing the Graduate Program in Physics, which studies the effects of the magnetic field on the electrocatalysis process in alkaline solutions. Therefore, during the development of the instrumentation, interdisciplinary research was used, applying knowledge of computer simulation, 3d modeling and 3d printing, theoretical knowledge of magnetism, materials science and electrochemistry. Once the development process was completed, after assembly and commissioning, the apparatus was used to carry out in-situ measurements, achieving the goal of this work. In addition, we measured that there is, indeed, a positive influence of the magnetic field in oxygen evolution reactions (OER). This improvement rises from the reduction of the necessary overpotential applied to the reaction for it to happen.