ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Growing awareness of dangers related to NOX emission by industry and roadtransportation has resulted in increasing demand for sensors detecting NOX. An important class ofthese sensors use Pt-based electrodes applied on yttria-stabilized zirconia (YSZ) substrates.Performance of such sensors depends on redox reactions occurring at electrodes in the testedatmospheres. Impedance spectra and j-U curves of PtRh electrodes were measured in a 3-electrodemode, using Pt metal pads as counter and reference electrodes. The data were collected in a 10mHz-100kHz frequency range at temperatures from 450 to 750°C. Each series of measurements wascarried out in a gas mixture with different oxygen content ranging from 0 to 21 vol%. It was foundout that the low-frequency part of the impedance spectra (characterizing electrode processes) wassensitive to the oxygen content in the gas mixtures
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/12/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.514-516.1379.pdf
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