Understanding practical catalysts using a surface science approach:: The importance of strong interaction between BaO and Al2O3 in NOx storage materials

被引：35

作者：

Yi, Cheol-Woo ^{[1
]}

Kwak, Ja Hun ^{[1
]}

Peden, Charles H. F. ^{[1
]}

Wang, Chongmin ^{[1
]}

Szanyi, Janos ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 41期

关键词：

D O I：

10.1021/jp0763376

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 interaction of NO2 with BaO/Al2O3/NiAl(110) model NOx storage materials was investigated at BaO coverages corresponding, to practical systems. The results obtained from these model systems show excellent correlation with those of practical systems. We found a specific, strong interaction between BaO and Al2O3, and this interaction profoundly influences the NOx, chemistry. BaO readily forms a Ba-aluminate-like surface phase, and upon the interaction with NOx, Ba ions are pulled out from this surface layer to form Ba(NO3)(2) clusters.

引用

页码：14942 / 14944

页数：3

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