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Synthesis, structure and oxygen-storage capacity of Pr1−xZrxO2−δ and Pr1−x−yPdyZrxO2−δ

Bellakki, Manjunath B. and Shivakumara, C and Baidya, Tinku and Prakash, A. S. and Vasanthacharya, N. Y. and Hegde, M. S. (2008) Synthesis, structure and oxygen-storage capacity of Pr1−xZrxO2−δ and Pr1−x−yPdyZrxO2−δ. Materials Research Bulletin, 43 (10). pp. 2658-2667.

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Abstract

Nanocrystalline Pr1−xZrxO2−δ (0 ≤ x ≤ 1) and Pr1−x−yPdyZrxO2−δ (x = 0.50, y = 0.02) solid solutions have been synthesized by a single step solution combustion method. The whole range of solid solution compositions crystallize in cubic fluorite structure. The lattice parameter ‘a’ linearly varied up to x = 1.0. Oxygen-storage capacity (OSC) and redox properties of Pr1−xZrxO2−δ (0.0 ≤ x ≤ 0.8) solid solutions have been investigated by temperature-programmed reduction (TPR) and are compared with those of Ce1−xZrxO2. Pr1−xZrxO2−δ exhibited H2 uptake and CO oxidation at a lower temperature than Ce1−xZrxO2. Small amount of Pd ion (y = 0.02) substitution was found to bring down the temperature of oxygen release–storage significantly.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Physical Science > Nanophysics
Physical Science > Nano objects
Analytical Science > Nanotechnology for sensing and actuating
Material Science > Nanostructured materials
Material Science > Nanochemistry
Physical Science > Photonics
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:3927
Deposited By:JNCASR
Deposited On:27 Jan 2009 04:04
Last Modified:31 Mar 2009 16:02

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