Determining the maximum lanthanum incorporation in the fluorite structure of La-doped ceria nanocubes for enhanced redox ability

被引：23
作者：
Loche, Danilo [1 ]
Morgan, Lucy M. [1 ]
Casu, Alberto [2 ]
Mountjoy, Gavin [1 ]
O'Regan, Colm [2 ]
Corrias, Anna [1 ]
Falqui, Andrea [2 ]
机构：
[1] Univ Kent, Sch Phys Sci, Ingram Bldg, Canterbury CT2 7NH, Kent, England
[2] King Abdullah Univ Sci & Technol, Biol & Environm Sci & Engn Div, Thuwal 239556900, Saudi Arabia
来源：
RSC ADVANCES | 2019年 / 9卷 / 12期
基金：
英国工程与自然科学研究理事会;
关键词：
NANOCRYSTALLINE CERIA; NANOPARTICLES; SIZE;
D O I：
10.1039/c8ra09766f
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Ceria nanocubes have been doped with increasing amounts of lanthanum to enhance their redox ability. X-ray diffraction and transmission electron microscopy techniques provide a consistent picture indicating that there is an upper limit to the lanthanum that can be incorporated in the fluorite structure of ceria nanocubes, which is close to 7.5 mol% La. This limited loading is nevertheless able to produce a significant enhancement of the ceria redox ability as evidenced by use of X-ray absorption spectroscopy to determine the Ce3+/Ce4+ ratio in samples submitted to a degassing treatment at room temperature.
引用
收藏
页码：6745 / 6751
页数：7
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