Contribution to the interpretation of the thermodynamic and kinetic behaviour of chlorine gas solid-state potentiometric sensors
✍ Scribed by C.M. Mari; A. Lauricella; D. Narducci; G.B. Barbi
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 336 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0925-4005
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✦ Synopsis
The response of a potentiometric sensor having a silver chloride layer interposed between the electronic conductor and the /Y'-alumina electrolyte is analysed. The open-circuit voltage is found to be Nernstian in the range lo-10 000 Pa of chlorine, with slight deviations from the theoretically expected values. The setting-up of a diffusion potential due to the formation of a new phase or a solid solution might account for these departures from theory. A normalized function of the output for step-like changes of chlorine pressure is defined. The approach to steady-state e.m.f. values is found to be linear with the square root of time.