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KMID : 1059519970410010001
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Journal of the Korean Chemical Society
1997 Volume.41 No. 1 p.1 ~ p.11
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Study on the Surface Reactions of Graphite Electrodes by Anodic Polarization
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Oh Han-Jun
Kim In-Ki
Lee Jong-Ho
Lee Young-Hoon
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Abstract
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Electrode surface reaction on three carbon materials(glassy carbon, synthesized graphite, graphite foil) in 0.5 M K2SO4 electrolyte is investigated by impedance spectroscopy during anodic polarization. The double layer capacitance of the graphite foil electrode is relatively higher than that of other two materials. The change of capacitance parameter C due to chemical adsorption on glassy carbon and synthesized graphite(PVDF graphite) is observed in 0.5 M K2SO4 solution at anodic polarization. In general, the faradic impedance on glassy carbon depends on anodic polarization, and the change of impedance parameter on graphite foil at anodic polarization is not remarkable, because this reaction is controlled by field transport.
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