Thermoelectric gas sensor with CO combustion catalyst for ppm level carbon monoxide detection

Daisuke Nagai, Takaomi Nakashima, Maiko Nishibori, Toshio Itoh, Noriya Izu, Woosuck Shin

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


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 languageEnglish
Pages (from-to)789-794
Number of pages6
JournalSensors and Actuators, B: Chemical
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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