| Title: |
Development of a Selective Mixed-Potential Ammonia Sensor for Automotive Exhausts |
| Authors: |
Nematbakhsh Abkenar, Gita; Viricelle, Jean-Paul; Rieu, Mathilde; Breuil, Philippe |
| Contributors: |
Département Procédés de Transformations des Solides et Instrumentation (PTSI-ENSMSE); Centre Sciences des Processus Industriels et Naturels (SPIN-ENSMSE); École des Mines de Saint-Étienne (Mines Saint-Étienne MSE); Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-École des Mines de Saint-Étienne (Mines Saint-Étienne MSE); Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT); Laboratoire Georges Friedel (LGF-ENSMSE); Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) |
| Source: |
ECS Meeting Abstracts ; 239th ECS Meeting with the 18th International Meeting on Chemical Sensors (IMCS 2020) ; https://hal.archives-ouvertes.fr/hal-02781043 ; 239th ECS Meeting with the 18th International Meeting on Chemical Sensors (IMCS 2020), May 2020, Montréal, Canada. pp.2163, ⟨10.1149/MA2020-01282163mtgabs⟩ ; https://iopscience.iop.org/issue/2151-2043/MA2020-01/28 |
| Publisher Information: |
HAL CCSD; ECS |
| Publication Year: |
2020 |
| Collection: |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
| Subject Terms: |
Ammonia; Mixed-potential sensors; Selectivity; Vanadium oxide; Gas sensor; [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering |
| Subject Geographic: |
Montréal |
| Time: |
Montréal, Canada |
| Description: |
Le congrès qui devait se déroulé du 10 au 14 mai 2020 a été annulé suite à la pandémie du COVID-19, les résumés étendus des inscrits ont été toutefois publié dans "ECS Meeting Abstracts" - Reporté en conférence digital du 30 mai au 3 juin 2021. ; International audience ; One of the most effective technologies in decreasing large-scale NO x emission produced by diesel engine vehicles is Urea-SCR (selective catalytic reduction) system. In order to prevent inducing excessive ammonia to the environment, an NH 3 sensor is required at the exit of this system. In this study, highly selective ammonia sensors were developed to detect ammonia emissions from automotive exhaust.The sensors were fabricated with 8-YSZ electrolyte, a platinum reference electrode and a working electrode of Au-V 2 O 5 (mass ratio 85/15), screen-printed on an alumina substrate. A platinum resistor was printed at the backside of the support to control the sensor temperature. The measured sensor’ response (ΔV) is the potential difference between reference and working electrodes. Figure 1 shows the responses of two identical sensors to 100 ppm CO, NO 2 , NO and 20 ppm of NH 3 at four different temperatures. It can be seen that the sensors respond to all gases at lower temperatures while by increasing temperature to 600°C, the selectivity to NH 3 is greatly improved. The selectivity of sensors was also confirmed by testing other possible interfering gases: no responses were observed for 20ppm of hydrogen and 100ppm of a hydrocarbon mixture. The stability of such sensors was studied at 550°C and 600°C. Since the sensors show no long-term stability at 600°C (electrode degradation), but remain stable at 550 °C, investigations were made to decrease the working temperature while maintaining selectivity. After testing different mass percentages of V 2 O 5 in working electrode, we observed that by increasing this value to 50%, the working temperature of selective ammonia sensors could be decreased to 550°C with stable responses. Further investigations will ... |
| Document Type: |
conference object |
| Language: |
English |
| Relation: |
hal-02781043; https://hal.archives-ouvertes.fr/hal-02781043; https://hal.archives-ouvertes.fr/hal-02781043/file/G%20Nematbakhsh%20ECS%20Meeting_IMCS%202020.pdf |
| DOI: |
10.1149/MA2020-01282163mtgabs |
| Availability: |
https://hal.archives-ouvertes.fr/hal-02781043; https://hal.archives-ouvertes.fr/hal-02781043/file/G%20Nematbakhsh%20ECS%20Meeting_IMCS%202020.pdf; https://doi.org/10.1149/MA2020-01282163mtgabs |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.7C889682 |
| Database: |
BASE |