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Gasochromic response of Pd/NiO nanostructured film towards hydrogen.


Yaacob, Mohd. Hanif and Campbell, J.L. and Wisitsoraat, A. and Wlodarski, W. (2011) Gasochromic response of Pd/NiO nanostructured film towards hydrogen. Sensor Letters, 9 (2). pp. 898-901. ISSN 1546-198X; ESSN:1546-1971


The gasochromic performance of nanostructured nickel oxide (NiO) films coated with 25 Å catalytic palladium (Pd) layer were investigated for low concentration hydrogen (H 2) sensing. NiO nanostructures of 20-30 nm sizes were produced via RF sputtering deposition of NiO x on quartz substrates and subsequently annealed at 500 °C. It was found that the Pd/NiO films show significant gasochromic response when exposed to H 2 at elevated temperatures. Integrating the absorbance change over a range of visible wavelengths (500-800 nm), has enabled very low concentrations of H 2 (0.06%) to be sensed in real time. T 90% response of 25 Å Pd/100 nm NiO film towards 0.06% H 2 in a balance of synthetic air was approximately 120 s at 170 °C. Similar H 2 concentration can be recovered in as little as 240 s at 170 °C.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1166/sl.2011.1639
Publisher: American Scientific Publishers
Keywords: Sputtered NiO; Palladium; Hydrogen sensing; Absorbance response; Optical.
Depositing User: Nur Farahin Ramli
Date Deposited: 23 Dec 2013 08:50
Last Modified: 28 Oct 2015 03:42
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1166/sl.2011.1639
URI: http://psasir.upm.edu.my/id/eprint/23501
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