Waste-free scale up synthesis of nanocrystalline hexaaluminate: properties in oxygen transfer and oxidation reactions

Laassiri, S., Bion, N., Can, F., Courtois, X., Duprez, D., Royer, S. and Alamdari, H. (2012) Waste-free scale up synthesis of nanocrystalline hexaaluminate: properties in oxygen transfer and oxidation reactions. CrystEngComm, 14(22), pp. 7733-7743. (doi: 10.1039/C2CE25737H)

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Abstract

Synthesis of nanocrystalline hexaaluminate is reported using an original activated reactive synthesis process. Starting from a classical ceramic solid, exhibiting low surface area and a micrometric crystal size, a two-step grinding process allows reduction of the crystal size down to a few nanometers and development of high surface areas. The synthetic process was then used to produce transition metal- and noble metal-doped structures. The effects of (i) morphological and structural properties and (ii) substitution on oxygen transfer properties and catalytic properties in CO and CH4 oxidation reactions were studied. Crystal size was shown to be a key parameter in controlling the bulk oxygen transfer. Study of the catalytic properties in low and high temperature oxidation reactions also shows the crucial effect of the morphological parameters. Highest activities were achieved over nanocrystalline high surface compositions. Finally, even if less active than classical palladium supported solids, these new structures exhibited extremely high thermal stability.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Laassiri, Dr Said
Authors: Laassiri, S., Bion, N., Can, F., Courtois, X., Duprez, D., Royer, S., and Alamdari, H.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:CrystEngComm
Publisher:Royal Society of Chemistry
ISSN:1466-8033
ISSN (Online):1466-8033
Published Online:04 July 2012

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