NH3 adsorption over lanthanide doped V2O5/Al2O3 catalysts

被引：20

作者：

Centeno, MA

Carrizosa, I

Odriozola, JA

机构：

[1] Univ Sevilla, CSIC, Ctr Invest Cientificas Isla Cartuja, Dept Quim Inorgan, Seville 41092, Spain

[2] Univ Sevilla, CSIC, Ctr Invest Cientificas Isla Cartuja, Inst Ciencia Mat Sevilla, Seville 41092, Spain

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 323卷

关键词：

NH3; adsorption; V2O5/Al2O3; catalysts; in situ DRIFTS;

D O I：

10.1016/S0925-8388(01)01186-0

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：

A diffuse reflectance FTIR spectroscopy (DRIFTS) study of the NH, adsorption from room temperature to 400 degreesC have been carried out over vanadia-alumina and vanadia-lanthanide-doped alumina catalysts. A shift of the ammonia adsorption bands to lower wavenumbers as well as a change in the geometry of the adsorption at room temperature is detected due to the presence of the lanthanide cation. On the other hand, lanthanide doped catalysts present new acid Lewis sites associated to the Ln(3+) species and an enhancement of their Lewis acidity, as compared with the undoped sample. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：597 / 600

页数：4

共 7 条

[1] In situ DRIFTS study of the SCR reaction of NO with NH3 in the presence of O2 over lanthanide doped V2O5/Al2O3 catalysts [J].