Impedance of rough capacitive electrodes: The role of surface disorder

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Abstract

The interfacial impedance of solid electrodes in the absence of Faradaic reactions usually deviates from purely capacitive behaviour; this effect is enhanced on rough electrodes. We present a qualitative experiment showing that capacitance dispersion on solid electrodes is due to surface disorder (i.e. heterogeneities on the atomic scale) rather than roughness (i.e. geometric irregularities much larger than those on the atomic scale).

Original languageEnglish
Pages (from-to)139-142
Number of pages4
JournalJournal of Electroanalytical Chemistry
Volume448
Issue number1
DOIs
Publication statusPublished - máj. 5 1998

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ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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