Hydrothermal processing and characterization of Ce1-xPbxO2-delta solid solutions

作者：Zhang Guofang; Li Liping^*; Li Guangshe; Qiu Xiaoqing; Yan Guofeng

来源：Solid State Sciences, 2009, 11(3): 671-675.

DOI：10.1016/j.solidstatesciences.2008.10.013

• Hydrothermal
• Buffer solution
• Solid solubility
• Oxygen storage capacity

Nanocrystals of Ce1-xPbxO2-delta (x = 0.00, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, and 0.35) were prepared by a hydrothermal reaction route. During the formation reaction, buffer solutions were explored as an effective additive to retain the initial molar ratio. With increasing the Pb2 content, the average crystallite size was slightly retarded. Morphologies observed by transmission electron microscope indicated that the particles were spherical-like and highly uniformed. Pb2 ions are homogenously distributed in the solid solutions. Analyses using X-ray diffraction, Raman and UV spectroscopies showed that the solid solubility limit of Pb2 in CeO2 was about x = 0.20. For x < 0.20, with increasing the Pb2 content, the bulk conductivity increased, and the oxygen storage capacity was enhanced as followed by a decrease in reduction temperature.

• 出版日期2009-3
• 单位中国科学院福建物质结构研究所; 福州大学; 内蒙古科技大学