Influence of CeO2 morphology on the catalytic activity of CeO2-Pt hybrids for CO oxidation

Singhania, Nisha and Anumol, EA and Ravishankar, N and Madras, Giridhar (2013) Influence of CeO2 morphology on the catalytic activity of CeO2-Pt hybrids for CO oxidation. In: DALTON TRANSACTIONS, 42 (43). pp. 15343-15354.

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Abstract

Ceria, because of its excellent redox behavior and oxygen storage capacity, is used as a catalyst for several technologically important reactions. In the present study, different morphologies of nano-CeO2 (rods, cubes, octahedra) were synthesized using the hydrothermal route. An ultrafast microwave-assisted method was used to efficiently attach Pt particles to the CeO2 polyhedra. These nanohybrids were tested as catalysts for the CO oxidation reaction. The CeO2/Pt catalyst with nanorods as the support was found to be the most active catalyst. XPS and IR spectroscopy measurements were carried out in order to obtain a mechanistic understanding and it was observed that the adsorbed carbonates with lower stability on the reactive planes of nanorods and cubes are the major contributor to this enhanced catalytic activity.

Item Type:	Journal Article
Publication:	DALTON TRANSACTIONS
Publisher:	ROYAL SOC CHEMISTRY
Additional Information:	copyright for this article belongs to ROYAL SOC CHEMISTRY
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	04 Dec 2013 11:30
Last Modified:	04 Dec 2013 11:30
URI:	http://eprints.iisc.ac.in/id/eprint/47853

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