摘要
采用加热回流技术制备了系列CexZr1-xO2(0.25≤x≤1)固溶体,通过N2物理吸附、XRD、Raman光谱、UV-Vis漫反射光谱表征了不同铈锆组成的铈锆复合氧化物结构对储氧性能的影响。结果表明,在铈锆组成比不同的样品之间,结构性质相差较大,随着载体中ZrO2mol%的增加,载体结构从相对的有序经无序再回到相对的有序。Ce0.4Zr0.6O2样品具有最高的储氧性能,而Ce0.25Zr0.75O2样品具有较高的热稳定性。
Heating reflux aging technology was applied to prepare a series of CexZr1-xO2（0. 25≤x≤1） solid solution. T effects of the CexZr1-xO2 composition on the structure and oxygen storage capacity were characterized using N2 physical adsorp tion, X-ray diffraction （XRD）, FT-Raman, UV-Vis diffuse spectroscopy techniques. The texture, structure and thermal stability of ceria-zirconia mixed oxides are closely related to the ratio of cerium to zirconium in the solid solution, with increasing the zirconium content, the specific area increases, and the structure undergoes a change of order→disorder→order. Among them, Ce0. 4 Zr0. 6 O2 sample possesses the maximum OSC and Ce0.25 Zr0. 75 O2 sample possesses the best thermal stability.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期2266-2269,共4页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(20271012)
福建省教委基金项目(JB05023)资助
关键词
铈锆氧化物固溶体
储氧性能
拉曼光谱
紫外-可见漫反射光谱
CeO2-ZrO2 solid solution
Oxygen storage capacity
Raman spectroscopy
UV-Vis diffuse reflection spectroscopy
