以Ce2(CO)3,ZrOCl2·8H2O和H2C2O4·2H2O为原料,第一次成功地采用了机械力活化固相化学法制备纳米Ce0.75Zr0.25O2粉体.以XRD、TEM分析及XPS等测试手段对Ce0.75Zr0.25O2粉体的结构和形貌进行了表征,结果表明,产物为单一立方相的球形粉体,平均粒径小于20nm,比表面积为85.4m2/g.通过TG-DTA分析,对合成过程中可能发生的化学反应机理进行了分析.对Ce0.75Zr0.25O2氧化物固溶体在三效催化剂中的活性进行了评价.
Nanostructured Ce0.75 Zr0.25O2 powder was successfully synthesized via mechanically activated raw materials. Their structure and morphology were characterized by X-ray powder diffractometry, transmission electron microscopy, X-ray photoelectron spectrometmetry and BET surface area testing technique. The results show that the powder is a single-cubic-phase, spherical shape, the average particle size is smaller than 20nm, and the specific surface area of 85.4m2/g. The possibly chemical reactions during the synthesis process were determined through TG-DTA investigation. The activity of Ce0.75 Zr0.25 O2 oxide solution in three-way catalysts was valued in this work.
参考文献
| [1] | S. Bernal;G. Blanco;J.J. Calvino .Some recent results on the correlation of nano-structural and redox properties in ceria-zirconia mixed oxides[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):521-525. |
| [2] | Q. X. Fu;W. Zhang;R. R. Peng .Doped ceria-chloride composite electrolyte for intermediate temperature ceramic membrane fuel cells[J].Materials Letters,2002(3):186-192. |
| [3] | Y.L. Zhang;X.J. Jin;T.Y. Hsu(Xu Zuyao) .Thermodynamic calculation of M_s in ZrO_2-CeO_2-Y_2O_3 system[J].Journal of the European Ceramic Society,2003(5):685-690. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%