Influence of synthesis route on the catalytic properties of La1−xSrxMnO3

Bell, Robert J., Millar, Graeme J., & Drennan, John (2000) Influence of synthesis route on the catalytic properties of La1−xSrxMnO3. Solid State Ionics, 131(3), pp. 211-220.

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Lanthanum Strontium Manganate (LSM) powders were synthesized by six different routes, namely solid state reaction, drip pyrolysis, citrate, sol-gel, carbonate and oxalate co-precipitation. The LSM samples, produced by firing to 1000 °C for 5 h were then characterized by way of XRD, TPD's of oxygen, TPR and catalytic activity for a simple oxidation reaction, that of carbon monoxide to carbon dioxide. It was found that although the six samples had similar compositions and surface areas they performed quite differently during catalytic characterization. These observed differences correlated more closely to the mode of synthesis, than to the physical properties of the powders, or their impurity levels, indicating that the surface structures created by the different syntheses perform very differently under catalysis conditions. Co-precipitation and drip pyrolysis produced structures that were most efficient at facilitating oxidation type reactions.

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ID Code: 62014
Item Type: Journal Article
Refereed: Yes
Keywords: lanthanum strontium manganate, synthesis, XRD, TPR, TPD
ISSN: 0167-2738
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Physical Chemistry not elsewhere classified (030699)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2000 Elsevier Science B.V.
Deposited On: 22 Aug 2013 22:58
Last Modified: 22 Aug 2013 22:58

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