Coarsening of Pt particles in a model NOx trap

被引：46

作者：

Graham, GW

Jen, HW

Chun, W

Sun, HP

Pan, XQ

McCabe, RW

机构：

[1] Ford Motor Co, Res & Adv Engn, Dept Chem Engn, Dearborn, MI 48121 USA

[2] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

来源：

CATALYSIS LETTERS | 2004年 / 93卷 / 3-4期

关键词：

NOx trap; automotive-exhaust catalyst; platinum; particle coarsening;

D O I：

10.1023/B:CATL.0000017065.47758.34

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of temperature and atmosphere on the coarsening of Pt particles in a model NOx trap (Pt/BaO/Al2O3) were examined by XRD, TEM, and CO chemisorption. The main finding, that the most significant particle growth occurs at elevated temperatures under oxidizing conditions, is relevant to NOx trap durability.

引用

页码：129 / 134

页数：6

共 3 条

[1] NOx storage reduction catalyst for automotive exhaust with improved tolerance against sulfur poisoning [J].