Voltammetric behavior of alizarin red S adsorbed on electrochemically pretreated glassy carbon electrodes

Hong Ping Dai, Kwok Keung SHIU*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

The electrochemical behavior of alizarin red S (dihydroxyanthraquinonesulfonate, ARS) adsorbed on electrochemically preanodized glassy carbon electrodes was studied by cyclic voltammetry. The adsorption of ARS was greatly enhanced by the electrochemical pretreatment of the electrodes. The central quinone functionalities of the adsorbed ARS underwent quasi-reversible reduction to give stable products. Oxidation of the dihydroxyl functionalities gave unstable products which underwent further follow-up chemical transformation to give new electroactive species. The products of the chemical transformation of the oxidized species could be further oxidized at a more positive potential, resulting in two pairs of quasi-reversible, quinone-like redox waves.

Original languageEnglish
Pages (from-to)2709-2715
Number of pages7
JournalElectrochimica Acta
Volume43
Issue number18
DOIs
Publication statusPublished - 16 Jun 1998

Scopus Subject Areas

  • Chemical Engineering(all)
  • Electrochemistry

User-Defined Keywords

  • Adsorption
  • Anthraquinonesulfonate
  • Electrochemical pretreatment
  • Glassy carbon
  • Voltammetric studies

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