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Development of a selective ammonia YSZ-based sensor and modeling of its response

Abstract : In the present study, Au-V2O5 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 NH3 while this selectivity was highly dependent on the temperature. Different V2O5 contents were tested in the sensing electrode. The results showed that by increasing V2O5 content from 15 wt.% to 50 wt.%, selective ammonia sensors could be achieved at 550 °C. The selectivity of Au-50%V2O5 sensor was also confirmed in gas mixtures of CO, NH3, NO, and NO2 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.
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Submitted on : Tuesday, April 20, 2021 - 12:41:53 PM
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Gita Nematbakhsh Abkenar, Mathilde Rieu, Philippe Breuil, Jean-Paul Viricelle. Development of a selective ammonia YSZ-based sensor and modeling of its response. Sensors and Actuators B: Chemical, Elsevier, 2021, 338, pp.129833. ⟨10.1016/j.snb.2021.129833⟩. ⟨emse-03192932⟩



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