Voltammetry at micro-mesh electrodes

• Autor(a) principal: Wadhawan,Jay D.
• Data de Publicação: 2003
• Outros Autores: Welford,Peter J., Yunus,Kamran, Fisher,Adrian C., Compton,Richard G.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Journal of the Brazilian Chemical Society (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532003000400004
• topic: micro-mesh electrodes; microelectrodes; partially-blocked electrodes; micro-ring electrodes; microband electrodes; voltammetry

The voltammetry at three micro-mesh electrodes is explored. It is found that at sufficiently short experimental durations, the micro-mesh working electrode first behaves as an ensemble of microband electrodes, then follows the behaviour anticipated for an array of diffusion-independent micro-ring electrodes of the same perimeter as individual grid-squares within the mesh. During prolonged electrolysis, the micro-mesh electrode follows that behaviour anticipated theoretically for a cubically-packed partially-blocked electrode. Application of the micro-mesh electrode for the electrochemical determination of carbon dioxide in DMSO electrolyte solutions is further illustrated.