Study of two vanadium based materials as working electrode for developing a selective mixed-potential ammonia sensor

Gita Nematbakhsh Abkenar (1, 2, 3) , Jean-Paul Viricelle (1, 2, 3) , Mathilde Rieu (1, 2, 3) , Philippe Breuil (1, 2, 3)

1 LGF-ENSMSE - Laboratoire Georges Friedel
2 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
3 PTSI-ENSMSE - Département Procédés de Transformations des Solides et Instrumentation

Mixed potential ammonia gas sensors were fabricated by using two sensing materials of Ni₃V₂O₈ and Au-V₂O₅ as working electrodes, YSZ as electrolyte and platinum as reference electrode. The results have shown that the Ni₃V₂O₈ sensors show cross-sensitivity toward NO gas. However, Au-V₂O₅ working electrodes displayed a high sensitivity to NH3 as well as very fast response and recovery times at high temperatures. Furthermore, the results indicate that the selectivity of Au-V₂O₅sensors increases by increasing temperature.

Mots clés: mixed potential sensor; Ni₃V₂O₈; vanadium oxide; working electrode; ammonia gas sensor

Domaines: Matériaux

Gita Nematbakhsh Abkenar, Jean-Paul Viricelle, Mathilde Rieu, Philippe Breuil. Study of two vanadium based materials as working electrode for developing a selective mixed-potential ammonia sensor. EUROSENSORS 2018, Materials Center Leoben Forschungs GmbH; University of Graz (Uni Graz); Graz University of Technology (TU Graz), Sep 2018, Graz, Austria. pp.770, ⟨10.3390/proceedings2130770⟩. ⟨hal-01996756⟩