Metal-support effects of platinum supported on zinc aluminate

被引：49

作者：

Zawadzki, M ^{[1
]}

Mista, W ^{[1
]}

Kepinski, L ^{[1
]}

机构：

[1] Polish Acad Sci, W Trzebiatowski Inst Low Temp & Struct Res, Dept Catalysis, PL-50950 Wroclaw 2, Poland

来源：

VACUUM | 2001年 / 63卷 / 1-2期

关键词：

zinc aluminate; platinum catalyst; metal-support interaction; PtZn alloys; catalytic combustion;

D O I：

10.1016/S0042-207X(01)00204-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline and nanoporous zinc aluminate spinel ZnAl2O4 was obtained on hydrothermal conditions at a low temperature. ZrAl2O4 support was impregnated by an incipient wetness technique using aqueous solutions of H2PtCl6 to obtain platinum contents up to 1 wt%, and then reduced with combustion gases at 673 K. After heat treatment in air or hydrogen how at temperatures up to 1473 K, the Pt/ZnAl2O4 system was characterised by the powder X-ray diffraction, high resolution transmission electron microscopy and textural studies (specific surface area and pore size distribution), and tested in total oxidation of iso-butene. It was found that platinum on zinc aluminate might strongly interact with the support in the reducing atmosphere, leading to a platinum-zinc alloy formation. The presence of Pt-Zn alloys on the surface of a catalyst leads to a reversible deactivation of Pt/ZnAl2O4 catalyst. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：291 / 296

页数：6

共 14 条

[1] METAL SUPPORT EFFECTS AND CATALYTIC PROPERTIES OF PLATINUM SUPPORTED ON ZINC ALUMINATE [J].