Selectivity and mechanism shifts in the reactions of acetaldehyde on oxidized and reduced TiO2(001) surfaces

被引：81

作者：

Idriss, H

Barteau, MA

机构：

[1] Department of Chemical Engineering, University of Delaware, Newark

来源：

CATALYSIS LETTERS | 1996年 / 40卷 / 3-4期

关键词：

acetaldehyde; butene; crotonaldehyde; aldol condensation; reductive carbonyl coupling; titanium dioxide;

D O I：

10.1007/BF00815275

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：

Depending on the oxidation state of the TiO2(001) surface, acetaldehyde can form C-4 products by either aldol condensation or reductive coupling routes. Aldol condensation generates crotonaldehyde and crotyl alcohol, and is favored on oxidized, stoichiometric surfaces. Reductive coupling produces butene, and occurs only on reduced surfaces. The switch-over in selectivity with increasing extents of surface oxidation provides important insights into the active site requirements for each of these reactions.

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页码：147 / 153

页数：7

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