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Journal of Electroceramics

, Volume 13, Issue 1–3, pp 771–774 | Cite as

Praseodymium-Cerium Oxide as a Surface-Effect Gas Sensor

  • Todd S. Stefanik
  • Harry L. Tuller
Article

Abstract

The gas sensing behavior of praseodymium doped cerium oxide (Pr x Ce1 − xO2 or PCO) has been examined for 0–1000 ppm CO or H2 in a 10% O2 atmosphere at temperatures ranging from 250–350_∘C. Total conductivity as a function of temperature suggests that oxygen diffusion kinetics are slow below approximately 350_∘C. Devices with x = 0.05 and 0.10 show stable, n-type gas sensing response, while those with x = 0.20 exhibit significant drift in sensor output, presumably due to bulk oxygen migration. The response to CO is significantly stronger than that to H2 at 300_∘C, and at 350_∘C the response to H2 is nearly zero, resulting in a CO-selective gas sensing element. Suggestions for the source of selectivity in PCO are presented.

Keywords

selectivity sensitivity CO sensing 

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References

  1. S.R. Morrison, Sensors and Actuators, 12, 425 (1987).Google Scholar
  2. S. Semancik et al., Sensors and Actuators B-Chemical, 77, 579 (2001).Google Scholar
  3. M.S. Nayak, R. Dwivedi, and S.K. Srivastava, Microelectronics Journal, 25, 17 (1994).Google Scholar
  4. Y. He, Y. Li, J. Yu, and Y. Qian, Materials Letters, 40, 23 (1999).Google Scholar
  5. F. Lu and S.-Y. Chen, in Preparation of Catalysts VI: Scientific Bases for the Preparation of Heterogeneous Catalysts, edited by G. Poncelet, et al. (Elsevier Science B. V., 1995), p. 489.Google Scholar
  6. G. Sberveglieri, Sensors and Actuators B, 6, 239 (1992).Google Scholar
  7. T.S. Stefanik and H.L. Tuller, in Materials Research Society Symposium Proceedings: Solid State Ionics—2002, edited by P. Knauth, J.-M. Tarascon, E. Traversa, H.L. Tuller, (Materials Research Society, PA Warrendale, 2002), vol. 756, p. 163.Google Scholar
  8. A.E.C. Palmqvist, E.M. Johansson, S.G. Järas, and M. Muhammed, Catalysis Letters, 56, 69 (1998).Google Scholar
  9. S. Sugiyama, Y. Matsumura, and J.B. Moffat, Journal of Catalysis, 139, 338 (1993).Google Scholar

Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Todd S. Stefanik
    • 1
  • Harry L. Tuller
    • 1
  1. 1.Massachusetts Institute of Technology, Department of Materials Science and EngineeringCrystal Physics and Electroceramics LaboratoryCambridgeUSA

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