Abstract
Thermoelectric gas sensors (TGS) for microcalorimeters with a CO combustion catalyst were fabricated and tested for the detection of ppm level CO. Two types of CO combustion catalysts containing 3 wt% Au, Pd, and Pt loaded on CoO and Co3O4 were prepared through a colloidal mixing process and integrated on the TGS. The 3 wt% AuPdPt loaded on the CoO and Co 3O4 catalysts exhibited stable CO combustion performance at temperatures as low as 200 C, which is a much lower temperature than that of a previous study using a Au/Co3O4 catalyst. The TGS of 3 wt%(AuPdPt)/CoO catalyst showed better CO selectivity than that of Co 3O4, and could detect CO over a wide concentration range from 1 ppm to 1% (v/v) CO in air, with a gas concentration resolution of 1 ppm CO, signal to noise ratio of 6.8, and CO selectivity against H2 of 1.75.
Original language | English |
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Pages (from-to) | 789-794 |
Number of pages | 6 |
Journal | Sensors and Actuators, B: Chemical |
Volume | 182 |
DOIs | |
Publication status | Published - 2013 |
Externally published | Yes |
Keywords
- AuPdPt/CoO
- CO oxidation
- Thermoelectric gas sensor
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry