Time-dependent decrease in the enhanced electrocatalytic activities observed after three different pretreatments of gold electrodes

Gorachand Dutta, Kyungmin Jo, Hyunwoo Lee, Boram Kim, Han Young Woo, Haesik Yang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This study reports how the electrocatalytic activities of gold (Au) electrodes change with aging under ambient conditions. The enhanced electrocatalytic activities of Au electrodes observed after piranha treatment, mechanical polishing, or NaBH4 treatment decrease with aging. The enhanced electrocatalytic activities toward p-benzoquinone reduction and glucose oxidation decrease 7 days after the treatments, even though the change in surface contamination during aging is not significant. The surface roughness of the Au electrodes is maintained during the NaBH4 treatment, whereas it changes substantially during the piranha treatment and mechanical polishing.

Original languageEnglish
Pages (from-to)41-46
Number of pages6
JournalJournal of Electroanalytical Chemistry
Volume675
DOIs
Publication statusPublished - 2012 Jun 15
Externally publishedYes

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Keywords

  • Aging
  • Electrocatalytic activity
  • Gold electrode
  • Piranha treatment

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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