SnO2-supported palladium catalysts:: activity in deNOx at low temperature

被引：39

作者：

Amalric-Popescu, D ^{[1
]}

Bozon-Verduraz, F ^{[1
]}

机构：

[1] Univ Paris 07, Lab Chim Mat Divises & Catalyse, F-75251 Paris 03, France

来源：

CATALYSIS LETTERS | 2000年 / 64卷 / 2-4期

关键词：

palladium; tin oxides; deNOx; photodeposition; CO adsorption; IR; UV-visible DRS;

D O I：

10.1023/A:1019051407087

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：

High surface area tin dioxide (174 m(2)/g) has been synthetised and characterised by XRD, TEM and UV-visible DRS. DRS gives evidence for the formation of oxygen vacancies (donor levels) under reducing conditions. CO adsorption gives rise to terminal carbonyl species linked to Sn4+ and Sn2+. Palladium-tin oxide catalysts have been prepared from various precursors (Pd(acac)(2) and Pd(NO3)(2) ) and by different preparation methods (grafting, photodeposition); they are active in deNOx reactions at low temperature (180 C-degrees) in the presence of stoichiometric CO-NO-O-2 mixtures. A mechanism involving palladium and oxygen vacancies is proposed.

引用

页码：125 / 128

页数：4

共 21 条

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