FTIR study of the photoinduced dissociation of CO2 on titania-supported noble metals

被引：47

作者：

Raskó, J ^{[1
]}

机构：

[1] Univ Szeged, Ctr Catalysis Surface & Mat Sci, Hungarian Acad Sci, React Kinet Res Grp, H-6701 Szeged, Hungary

来源：

CATALYSIS LETTERS | 1998年 / 56卷 / 01期

关键词：

thermal and photoinduced dissociation of CO2; CO2 adsorbed on oxide-supported noble metals; the effect of the nature of noble metals and supports; FTIR spectroscopy;

D O I：

10.1023/A:1019072021006

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 effect of illumination on the activation and dissociation of CO2 was investigated at 190 and 300 K on titania-supported noble metals by means of Fourier transform infrared spectroscopy. The photoinduced dissociation of CO2 (through the formation of CO2(a)(-)) resulting in CO(a) occurred on Pt/TiO2, Rh/TiO2 and Ir/TiO2; no CO(a) formation, however, was observed on Pd/TiO2 and Ru/TiO2. It is assumed that the CO2 on supported noble metals is bonded to the surface with both C (linked to a noble metal atom) and one of the O atoms (linked to the oxygen vacancy of the supports), and an extended charge transfer induced by illumination leads to the cleavage of a C-O bond.

引用

页码：11 / 15

页数：5

共 25 条

[1] LOW-ENERGY ELECTRON-DIFFRACTION AND ELECTRON-SPECTROSCOPY STUDIES OF CLEAN (110) AND (100) TITANIUM-DIOXIDE (RUTILE) CRYSTAL-SURFACES [J].