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
收藏
页码：96 / 101
页数：6
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