The influence of real structure of gold catalysts in the partial hydrogenation of acrolein

被引：197

作者：

Mohr, C

Hofmeister, H

Claus, P

机构：

[1] Tech Univ Darmstadt, Dept Chem, Inst Chem Technol 2, D-64287 Darmstadt, Germany

[2] Max Planck Inst Microstruct Phys, D-06120 Halle An Der Saale, Germany

来源：

JOURNAL OF CATALYSIS | 2003年 / 213卷 / 01期

关键词：

acrolein hydrogenation; degree of rounding; gold catalysm; MTPs; structure sensitivity;

D O I：

10.1016/S0021-9517(02)00043-X

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 hydrogenation of acrolein on supported gold catalysts has been used as test reaction to study several aspects of structure sensitivity, i.e., the dependence of activity and selectivity on the size of gold particles. We focused our work on the influence of the geometrical configuration of the supported gold nanoparticles, namely the occurrence of multiply twinned particles (MTPs) and the degree of rounding. A higher number of MTPs resulted in a lowering of selectivity to the desired product, allyl alcohol, as well as a lowering of the turnover frequency. The higher amount frequency of a gold catalyst supported on TiO2 compared to ZrO2 is attributed to a higher degree of rounding of the former. (C) 2003 Elsevier Science (USA). All rights reserved.

引用

页码：86 / 94

页数：9

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