Alkali (earth)-doped Au/Al2O3 catalysts for the total oxidation of propene

被引：84

作者：

Gluhoi, AC

Bogdanchikova, N

Nieuwenhuys, BE

机构：

[1] Leiden Univ, Leiden Inst Chem, Dept Heterogeneous Catalysis & Surface Chem, NL-2300 RA Leiden, Netherlands

[2] Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, Mexico

来源：

JOURNAL OF CATALYSIS | 2005年 / 232卷 / 01期

关键词：

gold; additives; alkali (earth) metal oxides; promoter; propene oxidation;

D O I：

10.1016/j.jcat.2005.02.016

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 addition of alkali (earth) metal oxides (MOx with M = Li, Rb, Mg, or Ba) is beneficial for the performance of Au/Al2O3 catalysts in the total oxidation of propene (C3H6). The effect of the MOx additives on the microstructure and nature of Au/Al2O3 catalyst was investigated by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), total surface area (BET), and diffuse reflectance ultraviolet visible spectroscopy (DR-UV/vis). It is found that MOx induces a decrease in the size of gold particles and stabilizes them against sintering. In turn, a direct dependence of the catalytic performance on the size of the gold particles is found. The role of the additives is that of a structural promoter and not a chemical promoter. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：96 / 101

页数：6

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