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

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

Authors

Katarina Cvejin

Jan Kulawik

Krzysztof Zaraska

Dorota Szwagierczak



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.

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