Partículas de CoO(OH) Dispersas em Pasta de Carbono Aplicado na Eletrooxidação de Compostos Fenólicos
- cobalt oxyhydroxide (III),
- modified electrode,
- electrochemical detection,
- phenolic compounds
Copyright (c) 2015 Orbital: The Electronic Journal of Chemistry
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In this work, particles of cobalt oxyhydroxide (III), CoO (OH), synthesized by alkaline precipitation were used in a carbon paste electrode modified [CPEM_CoO(OH)] for the detection of phenolic compounds (catechol, guiacol, pyrogallol and salicylic acid). The cobalt-based electrode acts as the electron mediator, where the ion Co (III) acts effectively in the oxidation/reduction of analyte, via reductive dissolution. As a result, the modified carbon paste electrode [CPEM_CoO(OH)] exhibited good performance in the detection of phenolic compounds in a concentration range between 0 to 0.15 µmol L-1, with a limit of detection (LOD) of 10-8 mol L-1. The electrochemical studies were performed using the techniques of cyclic voltammetry and linear.