Synthesis, structure and oxygen-storage capacity of Pr<SUB>1-x</SUB>Zr<SUB>x</SUB>O<SUB>2-δ</SUB> and Pr<SUB>1-x-y</SUB>Pd<SUB>y</SUB>Zr<SUB>x</SUB>O<SUB>2-δ</SUB>
- Bellakki, Manjunath B.
- Shivakumara, C.
- Baidya, Tinku
- Prakash, A. S.
- Vasanthacharya, N. Y.
- Hegde, M. S.
DOIAbstract
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 ...
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