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Catalytic and Thermal Characterisations of Nanosized Pdpt / Al2O3 for Hydrogen Detection : Volume 3, Issue 2 (30/10/2014)

By Mazingue, T.

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Book Id: WPLBN0003986672
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: Catalytic and Thermal Characterisations of Nanosized Pdpt / Al2O3 for Hydrogen Detection : Volume 3, Issue 2 (30/10/2014)  
Author: Mazingue, T.
Volume: Vol. 3, Issue 2
Language: English
Subject: Science, Journal, Sensors
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Hernandez-Rodriguez, C., Rousset, J., Passard, M., Morfin, F., Goujon, L., Mazingue, T.,...Laithier, J. (2014). Catalytic and Thermal Characterisations of Nanosized Pdpt / Al2O3 for Hydrogen Detection : Volume 3, Issue 2 (30/10/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: Univ. Savoie, SYMME, 74000 Annecy, France. Palladium platinum (PdPt) has been intensively studied these last decades due to high conversion rate in hydrogen oxidation at room temperature with significant exothermic effects. These remarkable properties have been studied by measuring the temperature variations of alumina (Al2O3) supported nanosized PdPt nanoparticles exposed to different hydrogen concentrations in dry air. This catalyst is expected to be used as a sensing material for stable and reversible ultrasensitive hydrogen sensors working at room temperature (low power consumption). Structural and gas sensing characterisations and catalytic activity of PdPt / Al2O3 systems synthesised by co-impregnation will be presented. Catalytic characterisations show that the system is already active at room temperature and that this activity sharply increases with rise in temperature. Moreover, the increase of the PdPt proportion in the co-impregnation process improves the activity, and very high conversion can be reached even at room temperature. The thermal response (about 3 °C) of only 1 mg of PdPt / Al2O3 is reversible, and the time response is about 5 s. The integration of PdPt / Al2O3 powder on a flat substrate has been realised by the deposition onto the powder of a thin porous hydrophobic layer of parylene. The possibility of using PdPt in gas sensors will be discussed.

Summary
Catalytic and thermal characterisations of nanosized PdPt / Al2O3 for hydrogen detection

Excerpt
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