The electrical double layer of carbon and graphite electrodes. Part V. Specific interactions with simple ions

D. Golub, A. Soffer, Y. Oren

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The specific interaction of halide and alkali metal ions with carbon and graphite electrodes was investigated by monitoring the dimensional changes and the charging current during a linear potential scan. The potential of zero charge (pzc), as detected by a minimum in the length vs. potential curve, is shifted towards more negative values when a larger halide is the anion in a single electrolyte solution and as the solution concentration increases. This is interpreted in terms of increasing specific interactions. Alkali cations, on the other hand, do not exhibit any measurable effects of specific interaction,. The differential capacity of both carbon and graphite increases due to specific interactions. However, the contribution to the capacity of the carbon is much larger than that for the graphite. This is interpreted on the basis of the much larger contribution of the edge planes in the carbon.

Original languageEnglish
Pages (from-to)383-392
Number of pages10
JournalJournal of Electroanalytical Chemistry
Volume260
Issue number2
DOIs
StatePublished - 10 Mar 1989
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry
  • General Chemical Engineering
  • Electrochemistry

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