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Topics in Catalysis

, 52:1898 | Cite as

Electrical In Situ Characterization of Three-Way Catalyst Coatings

  • Sebastian ReißEmail author
  • Marion Wedemann
  • Ralf Moos
  • Martin Rösch
Original Paper

Abstract

With a novel sensor, the electrical characteristics of a catalytically active three way catalyst coating can be gauged directly and evaluated. Therefore, in initial tests, several sensors that measure the electrical properties of the washcoat were mounted in a catalytic converter and the electrical resistances were measured. The sensors primarily provide information on the oxidation state of the oxygen storage compounds in the coating. It is shown that the sensor devices have fast response times and probably even react more sensitive to small changes in oxygen partial pressure than lambda-probes.

Keywords

On-board diagnosis (OBD) Catalyst status Oxygen storage OSC Ceria Exhaust gas sensor TWC 

Notes

Acknowledgment

The authors are indebted to Dr. Votsmeier for helpful discussions.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Sebastian Reiß
    • 1
    Email author
  • Marion Wedemann
    • 1
  • Ralf Moos
    • 1
  • Martin Rösch
    • 2
  1. 1.Bayreuth Engine Research CenterUniversity of BayreuthBayreuthGermany
  2. 2.Umicore AG & Co. KGHanauGermany

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