Scanning microsensors for measurement of local pH distributions at the microscale

Jung O. Park, Chi Hum Paik, R. C. Alkire

Research output: Contribution to journalArticlepeer-review


Ion-selective pH microelectrodes were used to measure hydroxide ion concentration fields produced by electrochemical reduction of oxygen on 10 and 25 μ, Pt disk electrodes. The sensors were mounted on a scanning system, and the hydroxide concentration profiles over the disk electrodes were obtained. Data were compared with predictions based on the diffusion equation. The pH microelectrode was also used to verify the buildup of hydroxide ions generated by cathodic reaction on Al3Fe that was in electrical contact with Al 6061 at the rest potential in 0.6 M NaCl.

Original languageEnglish (US)
Pages (from-to)L174-L176
JournalJournal of the Electrochemical Society
Issue number8
StatePublished - Aug 1996

ASJC Scopus subject areas

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


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