Study on the oxygen exchange capacities of Ce2Sn2O7 pyrochlore

被引：6

作者：

Huang, Hai ^{[1
]}

Miao, Xiang ^{[2
]}

Liao, Na ^{[2
]}

Wang, Longcheng ^{[2
]}

Jin, Dalai ^{[2
]}

机构：

[1] Zhejiang Sci Tech Univ, Coll Info Sci & Elect, Hangzhou 310018, Zhejiang, Peoples R China

[2] Zhejiang Sci Tech Univ, Mat Engn Ctr, Hangzhou 310018, Zhejiang, Peoples R China

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2011年 / 56卷 / 10期

基金：

美国国家科学基金会;

关键词：

SOLID-SOLUTION; A(2)B(2)O(7) PYROCHLORES; STRUCTURAL DISORDER; OXIDES; CONDUCTION; CE2SN2O7-CE2SN2O8; SYSTEM;

D O I：

10.1134/S0036023611100093

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Ce2Sn2O7 pyrochlore was synthesized by a hydrothermal method. X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to characterize the composition and valence state of the sample. The oxygen exchange property of the Ce2Sn2O7 phase was measured by an oxidation reaction in sealed air atmosphere and a followed reduction reaction in 5% H-2-95% N-2 atmosphere. Gas chromatography (GC) was used to analyze the oxygen change in the reaction. The results show that Ce2Sn2O7 sample has excellent oxygen absorption capacity at 250A degrees C as Ce3+ ions are oxidized to Ce4+ ions. The oxidized sample can be reduced by 5% H-2-95% N-2. The refreshed sample remains the capacity of oxygen absorption, while the oxygen exchange capacity degrades with the reduction times.

引用

页码：1621 / 1624

页数：4

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