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- W2043485726 abstract "Materials exhibiting reversible oxygen storage/release capacities are currently explored for elevated-temperature air separation and production of high-purity oxygen for several industrial processes. The development of improved oxygen storage or carrier materials is also critical to growth of new energy related technologies such as oxy-fuel and chemical looping combustion and reforming for clean coal energy and synthesis gas production. Currently, Ce 1-x Zr x O 2 are used around 500°C and have storage capacities of 400–500 μmol-O/g. Guided by our previous studies of the temperature and oxygen content dependence of the perovskite tolerance factor, we have developed synthesis method and discovered that hexagonal Dy 1-x Y x MnO 3+δ materials exhibit superior storage/release capacities as high as 2000 μmol-O/g in air. Large changes of oxygen content occur on cycling between unusually low temperatures near 250°C and 350°C, and are observed when materials transform among stoichiometric and interstitial oxygen-excess structures. These changes are related to alternation of Mn coordination to oxygen and are readily visible in material's resistivity and chemical expansion." @default.
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- W2043485726 date "2011-06-01" @default.
- W2043485726 modified "2023-10-18" @default.
- W2043485726 title "SYNTHESIS AND CHARACTERIZATION OF NON-STOICHIOMETRIC HEXAGONAL Dy1-xYxMnO3+δ" @default.
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- W2043485726 doi "https://doi.org/10.1142/s1793604711001804" @default.
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