Dosimeter-Type NO[subscript x] Sensing Properties of KMnO[subscript 4] and Its Electrical Conductivity during Temperature Programmed Desorption
Name
Tuller_Dosimeter-type.pdf
Size
658.38 KB
Format
Adobe PDF
Checksum (MD5)
1cce1493941de24d715cff4b76f95577
Author(s)
Groß, Andrea
Kremling, Michael
Marr, Isabella
Kubinski, David
Visser, Jacobus
Moos, Ralf
Tuller, Harry L.
Date Issued
April 2013
Journal
Sensors
Publisher
MDPI AG
Citation
Groß, Andrea, Michael Kremling, Isabella Marr, David Kubinski, Jacobus Visser, Harry Tuller, and Ralf Moos. “Dosimeter-Type NO[subscript x] Sensing Properties of KMnO[subscript 4] and Its Electrical Conductivity During Temperature Programmed Desorption.” Sensors 13, no. 4 (April 2013): 4428–4449.
Version
Final published version
Abstract
An impedimetric NO[subscript x] dosimeter based on the NO[subscript x] sorption material KMnO[subscript 4] is proposed. In addition to its application as a low level NO[subscript x] dosimeter, KMnO[subscript 4] shows potential as a precious metal free lean NO[subscript x] trap material (LNT) for NO[subscript x] storage catalysts (NSC) enabling electrical in-situ diagnostics. With this dosimeter, low levels of NO and NO[subscript 2] exposure can be detected electrically as instantaneous values at 380 °C by progressive NO[subscript x] accumulation in the KMnO[subscript 4] based sensitive layer. The linear NO[subscript x] sensing characteristics are recovered periodically by heating to 650 °C or switching to rich atmospheres. Further insight into the NO[subscript x] sorption-dependent conductivity of the KMnO[subscript 4]-based material is obtained by the novel eTPD method that combines electrical characterization with classical temperature programmed desorption (TPD). The NO[subscript x] loading amount increases proportionally to the NO[subscript x] exposure time at sorption temperature. The cumulated NO[subscript x] exposure, as well as the corresponding NO[subscript x] loading state, can be detected linearly by electrical means in two modes: (1) time-continuously during the sorption interval including NO[subscript x] concentration information from the signal derivative or (2) during the short-term thermal NO[subscript x] release.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.3390/s130404428
