Self-Regeneration of Pd-LaFeO3 Catalysts: New Insight from Atomic-Resolution Electron Microscopy

被引：99
作者：
Katz, Michael B. [1 ]
Graham, George W. [1 ]
Duan, Yingwen [1 ]
Liu, Hong [1 ]
Adamo, Carolina [2 ]
Schlom, Darrell G. [2 ]
Pan, Xiaoqing [1 ]
机构：
[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA
[2] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 45期
基金：
美国国家科学基金会;
关键词：
PEROVSKITE; PD;
D O I：
10.1021/ja2082284
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Aberration-corrected transmission electron microscopy was used to study atomic-scale processes in Pd-LaFeO3 catalysts. Clear evidence for diffusion of Pd into LaFeO3 and out of LaFe0.95Pd0.05O3-delta under high-temperature oxidizing and reducing conditions, respectively, was found, but the extent to which these processes occurred was quite limited. These observations cast doubt that such phenomena play a significant role in a postulated mechanism of self-regeneration of this system as an automotive exhaust-gas catalyst.
引用
收藏
页码：18090 / 18093
页数：4
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