Diode-type Gas Sensors Fabricated with a Titania Film on a Ti Plate and Pd-Pt Electrodes –Effects of Polymer Coating on the Hydrogen-sensing Properties

H2 responses of a diode-type gas sensor fabricated with a TiO2 film prepared by anodization of a Ti plate and Pd-Pt electrodes (Pd-Pt/TiO2) and the effects of polymer coating on the Pd-Pt/TiO2 sensor were investigated in this study. The H2 response of the Pd-Pt/TiO2 sensor in dry N2 was larger than...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2011-10, Vol.18 (21), p.212006-4
Main Authors: Hyodo, T, Nakaoka, M, Kaneyasu, K, Kato, H, Yanagi, H, Shimizu, Y
Format: Article
Language:English
Subjects:
Coated electrodes
Coating
Drying
Electrodes
Gas sensors
Palladium
Platinum
Polymer coatings
Polymers
Sensors
Titanium
Titanium dioxide
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Summary:H2 responses of a diode-type gas sensor fabricated with a TiO2 film prepared by anodization of a Ti plate and Pd-Pt electrodes (Pd-Pt/TiO2) and the effects of polymer coating on the Pd-Pt/TiO2 sensor were investigated in this study. The H2 response of the Pd-Pt/TiO2 sensor in dry N2 was larger than that in dry air at 250°C, but the addition of moisture into the atmosphere reduced O2 concentration dependence of H2 response. The responses decreased drastically at lower temperature (50°C), but the responses in N2 were larger than those in air under both dry and wet conditions. The coating of polymer on the Pd-Pt/TiO2 sensor increased the H2 responses in wet air and N2 and reduced O2 concentration dependence of H2 responses.
ISSN:1757-899X
1757-8981
1757-899X
DOI:10.1088/1757-899X/18/21/212006