Planar Impedancemetric NO Sensor with Thick Film Perovskite Electrodes Based on Samarium Cobaltite

Cvejin, Katarina; Manjakkal, Libu; Kulawik, Jan; Zaraska, Krzysztof; Szwagierczak, Dorota

Abstract

Impedancemetric NO sensors were fabricated, comprising yttria stabilized zirconia disc with thick film Sm0.9Sr0.1CoO3−δ electrodes of different design. Impedance measurements were performed at 600–800 °C for frequencies 0.01 Hz–100 kHz, in gas mixtures with 0–400 ppm of NO. The smaller arc on Nyquist plots can be associated with solid electrolyte-electrode interfacial phenomena, while the bigger one to the perovskite electrode reactions. As NO concentration increases, the bigger arc decreases and its maximum shifts toward higher frequencies. Both the sensitivity and the applicable NO concentration range were found to be dependent on the sensor design, temperature and chosen frequency.

Citation

Cvejin, K., Manjakkal, L., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2015). Planar Impedancemetric NO Sensor with Thick Film Perovskite Electrodes Based on Samarium Cobaltite. Electroanalysis, 27(3), 760-769. https://doi.org/10.1002/elan.201400602

• Journal Article Type: Article
• Acceptance Date: Dec 15, 2014
• Online Publication Date: Feb 12, 2015
• Publication Date: 2015-03
• Deposit Date: Jul 20, 2022
• Journal: Electroanalysis
• Print ISSN: 1040-0397
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 27
• Issue: 3
• Pages: 760-769
• DOI: https://doi.org/10.1002/elan.201400602
• Keywords: Electrochemistry; Analytical Chemistry
• Public URL: http://researchrepository.napier.ac.uk/Output/2891042