In Situ UV-Visible Spectroscopic Imaging of Laminar Flow in a Channel-Type Electrochemical Cell

Zhenghao Wang, Daniel Alberto Scherson

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Transmission ultraviolet-visible spectroscopy was employed to image concentration profiles of ferricyanide, generated in a channel-type cell by the oxidation of ferrocyanide on a gold electrode, by monitoring the absorbance as functions of distances either parallel to the flow or transverse to the flow. Steady-state measurements performed under diffusion-lim-ited conditions yielded excellent agreement with an earlier model of convection and diffusion, in the absence of any adjustable parameters. Transient measurements following the application of a current pulse showed that it was possible to detect substantially all of the produced ferricyanide, in agreement with Faraday's law. With further development, spectroscopic methods should be useful for on-line chemical analysis under forced convection.

Original languageEnglish
Pages (from-to)4225-4229
Number of pages5
JournalJournal of the Electrochemical Society
Volume142
Issue number12
DOIs
Publication statusPublished - 1995 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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