Defects in Surface Chemistry-Reductive coupling of Benzaldehyde on Rutile TiO2(110)

被引：24

作者：

Clawin, Peter M. ^{[1
]}

Friend, Cynthia M. ^{[2
]}

Al-Shamery, Katharina ^{[1
]}

机构：

[1] Carl von Ossietzky Univ Oldenburg, Inst Chem, D-26129 Oldenburg, Germany

[2] Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2014年 / 20卷 / 25期

基金：

美国国家科学基金会;

关键词：

defect chemistry; IR spectroscopy; reductive C-C coupling; surface chemistry; titania; VIBRATIONAL SPECTROSCOPY; INFRARED-SPECTROSCOPY; CHEMICAL-REACTIONS; REDUCED TIO2(110); TITANIUM-DIOXIDE; TIO2; OXYGEN; WATER; PHOTOCATALYSIS; METHANOL;

D O I：

10.1002/chem.201402102

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The surface chemistry of oxygen and oxygenates on Rutile TiO2(110) is of great interest for various applications such as heterogeneous catalysis and photo catalysis. Though it is generally accepted that surface defects are active sites, the role of subsurface defects is under debate. We have therefore investigated the influence of the bulk defect density on the reductive coupling of benzaldehyde to stilbene as a model system. Using IRRAS we identify stilbene diolate as a reduction intermediate. The concentration of this intermediate is proportional to the bulk defect density, whereas adsorption of benzaldehyde at lower temperatures is not affected, which indicates a dominant role of Ti interstitials at temperatures above 400 K.

引用

页码：7665 / 7669

页数：5

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