Local structure analyses of Ce0.5Zr0.5O2 mixed oxides by XAFS

被引：31

作者：

Nagai, Y ^{[1
]}

Yamamoto, T

Tanaka, T

Yoshida, S

Nonaka, T

Okamoto, T

Suda, A

Sugiura, M

机构：

[1] Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan

[2] Kyoto Univ, Dept Mol Engn, Kyoto 6068501, Japan

来源：

JOURNAL OF SYNCHROTRON RADIATION | 2001年 / 8卷 / 08期

关键词：

Ce0.5Zr0.5O2; oxygen storage capacity; CeK-edge and ZrK-edge XAFS;

D O I：

10.1107/S0909049500017520

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Three types of CeO2-ZrO2 with the same composition (Ce/Zr = 1) were prepared by different methods, exhibited the different oxygen storage/release capacity (OSC). To investigate the relationship between the OSC and the local structure, the Ce and Zr K-edges XAFS spectra for these samples were measured. The features of Fourier transforms of these samples were different from each other. This suggested that the OSC was remarkably exerted by the local structure around Ce and Zr. The quantitative curve-fitting analysis of EXAFS was applied, and it was concluded that homogeneous Ce0.5Zr0.5O2 solid solution at atomic level exhibited the highest OSC among these CeO2-ZrO2 with the same composition (Ce/Zr = 1).

引用

页码：616 / 618

页数：3

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