Catalytic redox activity and electrical conductivity of nanocrystalline non-stoichiometric cerium oxide

被引：66

作者：

Tschope, A ^{[1
]}

Ying, JY ^{[1
]}

Tuller, HL ^{[1
]}

机构：

[1] MIT,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1996年 / 31卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

nanocrystalline cerium oxide; catalytic redox activity; electrical conductivity;

D O I：

10.1016/0925-4005(96)80025-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Nanocrystalline cerium was synthesized by magnetron sputtering and inert gas condensation. Controlled post-oxidation of the metallic nanoclusters resulted in formation of oxygen-deficient cerium oxide. Catalytic redox reactions such as SO2 reduction by CO and CO oxidation in air were investigated. A comparison of activity with conventional stoichiometric ceria catalysts was used as a probe to distinguish different surface reactions. Electrical conductivity of nanocrystalline CeO2-x. was investigated by impedance spectroscopy and compared with literature data for single-crystal CeO2. The results are discussed in terms of the microstructure and defect chemistry of nanocrystalline cerium oxide.

引用

页码：111 / 114

页数：4

共 10 条

[1] CORRELATION BETWEEN IMPEDANCE, MICROSTRUCTURE AND COMPOSITION OF CALCIA-STABILIZED ZIRCONIA [J].