Electrochemical reversibility of reticulated vitreous carbon electrodes heat treated at different carbonization temperatures

AUTOR(ES)

Gonçalves, Emerson Sarmento, Rezende, Mirabel Cerqueira, Takahashi, Marta Ferreira Koyama, Ferreira, Neidenêi Gomes

FONTE

Materials Research

DATA DE PUBLICAÇÃO

2006-06

RESUMO

Electrochemical response of ferri/ferrocyanide redox couple is discussed for a system that uses reticulated vitreous carbon (RVC) three dimensional electrodes prepared at five different Heat Treatment Temperatures (HTT) in the range of 700 °C to 1100 °C. Electrical resistivity, scanning electron microscopy and X ray Diffraction analyses were performed for all prepared samples. It was observed that the HTT increasing promotes an electrical conductivity increasing while the Bragg distance d002 decreases. The correlation between reversibility behavior of ferri/ferrocyanide redox couple and both surface morphology and chemical properties of the RVC electrodes demonstrated a strong dependence on the HTT used to prepare the RVC.

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