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- W2951238206 abstract "Fluorite-type Ce0.5Zr0.5O2 and Ce0.5Hf0.5O2 have been synthesized by a solution combustion route, and their oxygen release and reduction have been investigated up to 850 °C. On reduction, the zirconium system forms two pyrochlore phases, Ce2Zr2O7 (pyrochlore-I) and Ce2Zr2O6.2 (pyrochlore-II), while the hafnium system forms only a disordered fluorite phase with the composition Ce0.5Hf0.5O1.77, under the same experimental conditions. The crystal structures of the reduction products have been characterized by powder X-ray diffraction and Rietveld refinement, and their electronic structures have been investigated by photoelectron spectroscopy and electrical conductivity measurements. Pyrochlore-I (a = 10.6727(4) A) is a semiconductor, while pyrochlore-II (a = 10.6463(8) A) is a good conductor (with a nearly temperature independent resistivity of ∼2.5 ohm·cm in the 400−1000 K range). X-ray photoelectron spectroscopy (XPS) shows an admixture of Ce(5d,6s) with Zr(4d) and O(2p) and a significant density of states..." @default.
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- W2951238206 date "2007-08-07" @default.
- W2951238206 modified "2023-10-16" @default.
- W2951238206 title "Oxygen-Release/Storage Properties of Ce0.5M0.5O2 (M: Zr, Hf) Oxides: Interplay of Crystal Chemistry and Electronic Structure." @default.
- W2951238206 cites W2091844646 @default.
- W2951238206 doi "https://doi.org/10.1002/chin.200732218" @default.
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