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

被引：103

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

页码：18090 / 18093

页数：4

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