Development of a selective ammonia YSZ-based sensor and modeling of its response.
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| Title: | Development of a selective ammonia YSZ-based sensor and modeling of its response. |
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| Authors: | Nematbakhsh Abkenar, Gita1 (AUTHOR), Rieu, Mathilde1 (AUTHOR) rieu@emse.fr, Breuil, Philippe1 (AUTHOR), Viricelle, Jean-Paul1 (AUTHOR) |
| Source: | Sensors & Actuators B: Chemical. Jul2021, Vol. 338, pN.PAG-N.PAG. 1p. |
| Subjects: | Ammonia, Ammonia gas, Materials testing, Detectors, Charge exchange, Electrode testing |
| Abstract: | • High temperature ammonia gas sensors were studied. • Au-V 2 O 5 sensing electrode was sensitive and selective to NH 3. • Gas sensor responses were modeled according to mixed potential theory. In the present study, Au-V 2 O 5 sensing material was tested as a sensing electrode for developing mixed-potential ammonia gas sensors. The results of gas sensing measurements indicated selective responses to NH 3 while this selectivity was highly dependent on the temperature. Different V 2 O 5 contents were tested in the sensing electrode. The results showed that by increasing V 2 O 5 content from 15 wt.% to 50 wt.%, selective ammonia sensors could be achieved at 550 °C. The selectivity of Au-50 %V 2 O 5 sensor was also confirmed in gas mixtures of CO, NH 3 , NO, and NO 2 gases. Modeling of the sensor responses in the ammonia concentration range 2–40 ppm at four oxygen concentrations was performed based on mixed-potential theory. Nernst and Butler-Volmer equations with an electron transfer assumption were used for data modeling. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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