NO reduction by isobutene, in the presence of oxygen, on platinum and copper, a comparative study

被引：4

作者：

Pradier, CM ^{[1
]}

Chen, W ^{[1
]}

Lu, H ^{[1
]}

Paul, J ^{[1
]}

机构：

[1] ROYAL INST TECHNOL,S-10044 STOCKHOLM,SWEDEN

来源：

CATALYSIS TODAY | 1996年 / 29卷 / 1-4期

关键词：

NO reduction; Pt catalyst; Cu catalyst;

D O I：

10.1016/0920-5861(95)00264-2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The reaction of NO, oxygen and isobutene was studied under conditions close to stoichiometric, on a platinum and on a copper disk in order to better understand the role of each metal, free of any support and dispersion effects. The products of the reaction were analysed by mass spectrometry and an XPS characterization of the surface was carried out at different stages of the reaction. A correlation between the catalytic activity for NO conversion and the presence of adsorbed intermediates has been clearly demonstrated on platinum. On copper, a redox cycle of the metal is necessary to activate the catalyst, On platinum, oxygen is necessary to initiate the reaction, clean the surface and form reactive intermediates; the reaction is strongly sensitive to oxygen concentration, whereas on copper, oxygen does not directly participate in the reaction mechanism.

引用

页码：59 / 65

页数：7

共 12 条

[1] MECHANISM OF THE SELECTIVE REDUCTION OF NITROGEN MONOXIDE ON PLATINUM-BASED CATALYSTS IN THE PRESENCE OF EXCESS OXYGEN [J].