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Proceedings 2017, 1(4), 487;

Oxyhydrogen and Hydrogen Detection by Gasochromic Coloration of Highly Porous Tungsten Oxide with Fractal-Like Pd Nanoparticles

Department of Physics, Isfahan University of Technology, Isfahan 8415683111, Iran
SENSOR Laboratory, Università di Brescia, 25121 Brescia, Italy
CNR-INFM, Universitá di Brescia, 25121 Brescia, Italy
Dipartimento di Chimica e Fisica, Università di Brescia, 25121 Brescia, Italy
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
Author to whom correspondence should be addressed.
Published: 28 August 2017
(This article belongs to the Proceedings of Eurosensors 2017)
PDF [1370 KB, uploaded 28 August 2017]


WO3 thin films were deposited by pulsed laser deposition (PLD) on glass substrates at 100 mTorr oxygen pressure. Monodispersed palladium nanoparticles (50 nm) were synthesized by hydrogen reduction of PdCl2 drop-casted on the surface of the films. For oxyhydrogen detection, first a saturated coloration by 10%H2/Ar was prepared. Then different oxygen flow with certain O2:H2 ratios were exposed to the colored samples. Depending on this ratio, the optical density of samples was observed to drop into certain new values until vanishes for a ratio about 20. A desirable fast coloration with linear dependency on hydrogen concentration was also observed.
Keywords: hydrogen sensor; gasochromic; Pd/WO3 hydrogen sensor; gasochromic; Pd/WO3
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Ranjbar, M.; Sberveglieri, G. Oxyhydrogen and Hydrogen Detection by Gasochromic Coloration of Highly Porous Tungsten Oxide with Fractal-Like Pd Nanoparticles. Proceedings 2017, 1, 487.

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