| Quaternary Oxide of Cerium, Terbium, Praseodymium and Zirconium for Three-Way Catalysts |
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| 作者姓名： | 康振晋 康振川 |
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| 作者单位： | Department of Chemistry Yanbian University Yanji 133002 China，State Key Laboratory for Surface Physics and International Center for Quantum Structures Institute of Physics Chinese Academy of Sciences Beijing 100080 China |
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| 摘 要： | Inthelastdecadethethree waycatalystshave beenremarkablyimproved.Oxygenstoragecapacity(OSC)ofthecatalystwasdeterminedbyTPR.The measuredvalueisactuallyapartoftheoxygentransfer capacity(OTC)offluorite typeoxidescontainingCe,and orPr,and orTb1,2].Theseoxides,Ce1-x-y PrxTbyO2-δ(0≤x≤1,0≤y≤1,0≤δ≤0.5)can releasetheirlatticeoxygenwhenthetemperatureisin creasedunderdifferentoxygenpartialpressureinclud inghydrogenflow,buttheywillabsorboxygenfromits vicinityenvironmentwhenthetemperatureisde…
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| 关 键 词： | 储氧容量 三元催化剂 稀土 铈 铽 镨 锆 |
| 文章编号： | 1002-0721（2006）03-314-06 |
| 收稿时间： | 12 September 2005 |
Quaternary Oxide of Cerium, Terbium, Praseodymium and Zirconium for Three-Way Catalysts |
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| Zhenjin ,Zhenchuan Kang,.Quaternary Oxide of Cerium, Terbium, Praseodymium and Zirconium for Three-Way Catalysts[J].Journal of Rare Earths,2006,24(3):314-319. |
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| Authors: | Zhenjin Zhenchuan Kang |
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| Affiliation: | aDepartment of Chemistry, Yanbian University, Yanji 133002, China;bState Key Laboratory for Surface Physics and International Center for Quantum Structures, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | Oxygen storagecapacity (OSC), oxygen buffer capacity (OBC), X-ray diffraction and electron diffraction pattern, high resolution electron microscopy were used to study the quaternary oxides, i.e., of Ce, Tb, Pr and Zr. (Ce0.6Tb0.2Zr0.2O2-δ and Ce0.6Pr0.2Zr0.2O2-δ). OSC and OBC data indicate that these oxides have very good oxygen transfer capacity (OTC) and their pseudo-solid solutions exhibit fluorite-type structure. These oxides may act as a good candidate for three-way catalysts (TWC). |
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| Keywords: | oxygen storage capacity oxygen buffer capacity three-way catalysts rare earths |
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