CHEMICAL BASIS OF METAL CATALYST PROMOTION

被引：13

作者：

VANSANTEN, RA

机构：

[1] Schuit Institute of Catalysis, Eindhoven University of Technology, 5000 Eindhoven, P.O. Box 513, NL

来源：

SURFACE SCIENCE | 1991年 / 251卷

关键词：

D O I：

10.1016/0039-6028(91)90944-N

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：

A survey is presented of the different modes of action of metal catalyst promotors. Broadly two main categories can be distinguished: structural and bifunctional promotors. In structural promotion the promoting atoms do not participate themselves in the elementary steps of a catalytic reaction. Bifunctional promotors participate themselves chemically in the catalytic reaction. Five different kinds of structural promotion can be recognized: ensemble-size regulating; valence-state promotion; polarizing-structural promotion; surface-phase and cluster complex promotion; particle size stabilizing. Each subcategory is discussed shortly and when relevant illustrated with a practical example. Three different kinds of bifunctional promotors can be distinguished: Polarizing-bifunctional promotion; direct-bifunctional promotion; chemical-bifunctional promotion. Whereas conceptually different, subcategories are not always easily experimentally distinguishable. Of most of the different kinds of promotion theoretical treatments exists. Quantum-chemical studies are referred to in the text.

引用

页码：6 / 11

页数：6

共 55 条

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