NDLI: Mesoporous ceria-zirconia solid solutions as oxygen gas sensing material using high temperature hot plates

Content Provider	IEEE Xplore Digital Library
Author	Ghom, S.A. Andreu, T. Zamani, C. Morante, J.R.
Copyright Year	2012
Description	Author affiliation: IREC Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, Sant Adrià del Besòs, 08930, Spain (Ghom, S.A.; Andreu, T.; Morante, J.R.) \|\| Department of electronics, University of Barcelona (UB), Marti i Franquès 1, 08028 Barcelona, Spain (Zamani, C.)
Abstract	Mesoporous ceria and ceria-zirconia solid solutions have been synthesized following a route based on the use of silica hard template. Two different structures have been selected, one based on a three dimensional gyroidal structure, named KIT6, and other based on a two dimensional layered structure named SBA15. The presence of zirconium in the ceria sub lattice enhances the capability to transform $Ce^{+4}$ to $Ce^{+3}$ such as it is proved from the thermogravimetry measurements that show a large increase of the oxygen storage capacity. Ce solid solutions prepared making replicas of previously synthesized mesoporous silica have been characterized and tested under different oxygen-containing atmospheres at sensing temperatures above 500ºC with oxygen variation between 1% to 100% of oxygen. This binary compound oxide present a variation of its electrical conductivity with the oxygen partial pressure that follow a potential law $R=Ro[O]^{1/n}$ with n = 4 corroborating that the sensing mechanism is dominated by electronic conductivity processes related to the contribution of the $Ce^{+3}.$ Therefore, these high stable mesoporous materials with high active surface become a promising candidate as oxygen sensing materials for gas sensing hotplate platforms.
Starting Page	277
Ending Page	280
File Size	688787
Page Count	4
File Format	PDF
ISBN	9781467307376
ISSN	1545857X
e-ISBN	9781467307383
DOI	10.1109/SMICND.2012.6400786
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-15
Publisher Place	Romania
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Solids Temperature sensors Mesoporous materials Zirconium Atmosphere Microhotplates Metal Oxide Mesoporosous Oxygen sensor
Content Type	Text
Resource Type	Article

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