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Moving Electrode Impedance Spectroscopy for Accurate Conductivity Measurements of Corrosive Ionic Media.

Authors
  • Doppelhammer, Nikolaus1
  • Pellens, Nick2
  • Martens, Johan2
  • Kirschhock, Christine E A2
  • Jakoby, Bernhard1
  • Reichel, Erwin K1
  • 1 Institute for Microelectronics and Microsystems, JKU Linz, A-4040 Linz, Austria. , (Austria)
  • 2 Centre for Surface Chemistry and Catalysis: Characterization and Application Team, KU Leuven, 3000 Leuven, Belgium. , (Belgium)
Type
Published Article
Journal
ACS sensors
Publication Date
Nov 25, 2020
Volume
5
Issue
11
Pages
3392–3397
Identifiers
DOI: 10.1021/acssensors.0c01465
PMID: 33107724
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

A measurement cell for the use of accurate conductivity measurements of corrosive ionic media is presented. Based on the concept of moving electrode electrochemical impedance spectroscopy, exceptional measurement accuracy is achieved in a large conductivity range. Extensive testing with corrosive ionic media demonstrated the robust operation of the cell under harsh chemical conditions, up to temperatures of 130 °C. The novel design allows monitoring small conductivity changes during chemical reactions in ionic media, for instance, zeolite formation from hydrated ionic liquids.

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