Thermal Stability and Reductive Property of CexZr1-xO2 Solid Solution Doped Simultaneously by Fe, Mn or Fe, Cu
来源期刊：JOURNAL OF RARE EARTHS2005年第3期
论文作者：WEN Mingfen Gu Yongwan Chen Jing Yan Zhongjun Yang Dong Wang Jinggang
Key words：CexZr1-xO2 solid solution; Fe; Mn; Cu; TPR; rare earths;
Abstract: CexZr1-xO2 complex oxides doped by transition metal(Fe, Mn, Cu) were prepared by precipitation method. Thermal stability of samples was characterized by XRD, surface areas were measured by BET method and reductive property was characterized by TPR. The results show that MnO2 can be dispersed in solid solution after calcined at 1273 K, when the loading is 12%, while Fe and Cu is easy to separate from samples at this temperature. Samples doped simultaneously by Fe, Mn or Fe, Cu demonstrated high reactive property at low temperature. The starting reduction temperature are 413 and 373 K, respectively. TPR results also show a broad range of reductive temperature exists in these bi-metal doped samples.
WEN Mingfen1，Gu Yongwan2，Chen Jing1，Yan Zhongjun1，Yang Dong1，Wang Jinggang3
(1.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 102201, China;
2.Kunming Sino-Platinum Metals Catalyst Limited Corporation, Kunming 650101, China;
3.College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China)
Abstract:CexZr1-xO2 complex oxides doped by transition metal(Fe, Mn, Cu) were prepared by precipitation method. Thermal stability of samples was characterized by XRD, surface areas were measured by BET method and reductive property was characterized by TPR. The results show that MnO2 can be dispersed in solid solution after calcined at 1273 K, when the loading is 12%, while Fe and Cu is easy to separate from samples at this temperature. Samples doped simultaneously by Fe, Mn or Fe, Cu demonstrated high reactive property at low temperature. The starting reduction temperature are 413 and 373 K, respectively. TPR results also show a broad range of reductive temperature exists in these bi-metal doped samples.
Key words:CexZr1-xO2 solid solution; Fe; Mn; Cu; TPR; rare earths;
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