Study of the pretreatment chemistry and thermal stability of zirconia supported Ru-Pt catalysts

被引：7

作者：

González-Velasco, JR ^{[1
]}

Gutiérrez-Ortiz, MA ^{[1
]}

González-Marcos, JA ^{[1
]}

Pranda, P ^{[1
]}

Steltenpohl, P ^{[1
]}

机构：

[1] Univ Basque Country, EHU, Fac Ciencias, Dept Ingn Quim, E-48080 Bilbao, Spain

来源：

JOURNAL OF CATALYSIS | 1999年 / 187卷 / 01期

关键词：

ruthenium; platinum; adsorption; impregnation; zirconia; bimetallic; thermal stability; precursor decomposition; IR; TPR; DSC; MS;

D O I：

10.1006/jcat.1999.2580

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 behavior of zirconia supported Ru and/or Pt catalysts in conditions of TPReduction and pulse chemisorption is studied. In order to understand the process of precursor decomposition, several catalysts prepared by either (co)adsorption or (co)impregnation methods and treated in air or nitrogen are investigated by DSC, MS, and by IRS. A possible adsorption path of Ru(NO)(NO3)(3) over zirconia and its subsequent decomposition during catalyst conditioning is discussed. Stabilization of supported ruthenium in the presence of platinum due to formation of bimetallic cluster was observed, especially when the catalyst was prepared by adsorption. (C) 1999 Academic Press.

引用

页码：24 / 29

页数：6

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