Journal
SOLID STATE IONICS
Volume 179, Issue 27-32, Pages 1628-1631Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2008.01.044
Keywords
mixed potential; nitric oxide sensor; perovskites; impedance spectroscopy
Categories
Ask authors/readers for more resources
Electrochemical solid electrolyte sensors are suited for the reliable measurement of NO in hot exhaust gases of automotive and industrial combustion processes. Important sensor parameters like sensitivity, selectivity and long-term stability are correlated mainly with the performance of the material of the mixed potential electrodes. The aim of this work is the characterization of newly developed perovskite materials from the group La0.6Ca0.4MnxMe1-xO3-delta with Me=Ni, Co and x=0-0.6 with respect to their electrochemical behavior in NO and C3H6 containing gases and its correlation with conductivity and defect chemistry. Maximum sensitivity was found for the materials with Me=Ni and x=0.2-0.3. EIS measurements show that the NO diminishes the electrode resistance also for materials with no potentiometric sensitivity to NO. Correlating the results of conductivity and oxygen stoichiometry measurements, it seems that n-type conductors are more promising materials for NO detection with mixed potential sensors. (C) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available