Acetaldehyde photochemistry on TiO2(110)

被引：91

作者：

Zehr, R. T. ^{[1
]}

Henderson, M. A. ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA

来源：

SURFACE SCIENCE | 2008年 / 602卷 / 13期

关键词：

photon stimulated desorption; thermal desorption spectroscopy; photocatalysis; titanium dioxide; acetaldehyde;

D O I：

10.1016/j.susc.2008.04.045

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 ultraviolet (UV) photon induced decomposition of acetaldehyde adsorbed on the oxidized rutile TiO2(110) surface was studied with photon stimulated desorption (PSD) and thermal programmed desorption (TPD). Acetaldehyde desorbs molecularly from TiO2(110) with minor decomposition channels yielding butene on the reduced TiO2 surface and acetate on the oxidized TiO2 surface. Acetaldehyde adsorbed on oxidized TiO2(110) undergoes a facile thermal reaction to form a photoactive acetaldehyde-oxygen complex. UV irradiation of the acetaldehyde-oxygen complex initiated photofragmentation of the complex resulting in the ejection of methyl radical into gas phase and conversion of the surface bound fragment to formate. Published by Elsevier B.V.

引用

页码：2238 / 2249

页数：12

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