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  Home > JCE Print > Journal of Chemical Education > Issues > 1999  > December  >
In the Laboratory
Laboratory Application and Demonstration of Automotive Oxygen Sensors
T. Schober and J. Friedrich
Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany
Cover
December 1999
Vol. 76 No. 12
p. 1697
Abstract
The application and demonstration of automotive oxygen (lambda) sensors in the laboratory is discussed. After a presentation of the electrochemical principle, selected experiments are outlined, which cover a broad spectrum of possible applications. In addition to the possibility of measuring partial pressures of oxygen, the use of these sensors in a fuel cell mode is described. Closely related to the latter case is the measurement of water vapor pressures in certain gas mixtures. Passing currents through the sensors allows removing (or adding) trace oxygen from (to) gas streams. In this way, low pO2 (10-22 bar) Ar-H2O-H2 mixtures may be generated. Electrochemical pumping of oxygen from CO2 gas streams allows the production of low pO2 CO2-CO mixtures.
More Information
*  Citation
 Schober, T.; Friedrich, J. J. Chem. Educ. 1999 76 1697.
*  Keywords
 Electrochemistry; Physical Chemistry; Solid-State Chemistry; Thermodynamics; Laboratory Instruction
*  History
 Created:
Last Updated:		 November 10, 1999
June 23, 2005
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