Structural studies of electrochemically activated glassy carbon electrode: Effects of chloride anion on the redox responses of copper deposition

Kang Shi*, Kun Hu, Sheng Wang, Chung Yin Lau, Kwok Keung SHIU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

The redox behaviors of copper species at electrochemically activated glassy carbon electrodes have been investigated in aqueous solutions containing chloride anions. Experimental results showed that the voltammetric responses of copper species were influenced by the electrochemical activation means employed. Abnormal copper stripping was observed at electrodes obtained by cyclic polarization. Cyclic polarization would cause changes in the interwoven graphitic crystalline surface of glassy carbon, producing electrode interface with low distribution density of electron transfer sites for the early nucleation of metallic copper in the presence of chloride anion. Potentiostatic activation would generate oxygen-containing functionalities and maintain the basic surface structure of graphitic crystalline with high distribution density of electron transfer sites.

Original languageEnglish
Pages (from-to)5907-5913
Number of pages7
JournalElectrochimica Acta
Volume52
Issue number19
DOIs
Publication statusPublished - 25 May 2007

Scopus Subject Areas

  • Chemical Engineering(all)
  • Electrochemistry

User-Defined Keywords

  • Chloride anions
  • Copper deposition and stripping
  • Electrochemical activation
  • Glassy carbon
  • Surface structure

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