Electrochemical and geometrical characterization of iridium oxide electrodes in stainless steel substrate

Artículo

Autoría

Mayorga Martinez, Carmen Clotilde ; MADRID, ROSSANA ELENA ; FELICE, CARMELO JOSE

Fecha

2008

Editorial y Lugar de Edición

Elsevier Science Sa

Revista

SENSORS AND ACTUATORS B-CHEMICAL, vol. 133 (pp. 682-686) Elsevier Science Sa

Resumen Información suministrada por el agente en SIGEVA

A geometrical and electrochemical characterization of stainless steel electrodes electrodeposited with iridium oxide (IrO2) is presented. There is a dramatic increase in the double layer capacitance (C) and an important decrease in the charge transfer resistance (Rct) after electrodeposition, causing also a significant two orders of magnitude reduction of the electrode-electrolyte interface impedance (EEIZ). These phenomena may be explained by the fine-grained iridium oxide, which has a high gr... A geometrical and electrochemical characterization of stainless steel electrodes electrodeposited with iridium oxide (IrO2) is presented. There is a dramatic increase in the double layer capacitance (C) and an important decrease in the charge transfer resistance (Rct) after electrodeposition, causing also a significant two orders of magnitude reduction of the electrode-electrolyte interface impedance (EEIZ). These phenomena may be explained by the fine-grained iridium oxide, which has a high grain boundary density and which increases the actual electrodic area. An RC model is presented, which would explain the electrical behaviour of the system.

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Palabras Clave

RANDLES MODELIRIDIUM OXIDEELECTRODE-ELECTROLYTE IMPEDANCEEIROF LAYERS

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http://hdl.handle.net/11336/65901