Communication - The reduction of selenate mediated by underpotential deposited copper on gold electrodes in acidic solutions: Analytical applications

Jonathan R. Strobl, Daniel Alberto Scherson

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Voltammetric techniques have been employed to show that underpotential deposited Cu on polycrystalline Au electrodes in aqueous 0.1 M HClO4 catalyzes the reduction of purified selenate, SeO4 2-, to yield a layer of adsorbed copper selenide, CuxSe. Subsequent oxidation of this layer led to the loss of Cu, leaving behind adsorbed, elemental Se, which could be oxidized to selenite, SeO3 2-, at higher potentials. Application of this method made it possible to detect SeO4 2- down to nM levels. Voltammetric features observed on Au(poly) in Cu2+-free 0.1 M HClO4 containing SeO4 2- reported earlier in the literature could be attributed to the reduction of SeO3 2- impurities present in the commercial chemical.

Original languageEnglish
Pages (from-to)H1066-H1068
JournalJournal of the Electrochemical Society
Volume163
Issue number13
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrochemistry

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