Species formed after NO adsorption and NO+O2 co-adsorption on TiO2:: an FTIR spectroscopic study

被引：233

作者：

Hadjiivanov, K ^{[1
]}

Knözinger, H

机构：

[1] Bulgarian Acad Sci, Inst Gen & Inorgan Chem, BU-1113 Sofia, Bulgaria

[2] Univ Munich, Dept Chem Phys Chem, D-81377 Munich, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2000年 / 2卷 / 12期

关键词：

D O I：

10.1039/b002065f

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：

Adsorption of NO and its co-adsorption with oxygen on TiO2 (Degussa P-25) were studied by FTIR spectroscopy. It was found that NO adsorption results in its disproportionation to NO- (1170 cm(-1)), N2O22- (1335 cm(-1)) and nitrates (1650-1550 and 1240-1220 cm(-1)). The nitrate bands develop with time and coordinated NO (ca. 1900 cm(-1)) is formed. Addition of oxygen to NO results in a strong increase in concentration of the nitrates and formation of NO+ (2206 cm(-1)). In addition, species assigned to nitrocomplexes (1520 and 1284 cm(-1)) are found. The stability and reactivity of the different surface compounds as well as their interconversion are studied and discussed.

引用

页码：2803 / 2806

页数：4

共 32 条

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