TEMPORAL AND SPATIAL SELF-ORGANIZATION IN CATALYSIS AT SINGLE-CRYSTAL SURFACES

被引：24

作者：

ERTL, G

机构：

[1] Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin 33, W-1000

来源：

CATALYSIS LETTERS | 1991年 / 9卷 / 3-4期

关键词：

OSCILLATORY CATALYTIC REACTIONS; SPATIAL DIFFERENCES IN SURFACE CONCENTRATIONS OF REACTANTS; CARBON MONOXIDE OXIDATION ON PT(110);

D O I：

10.1007/BF00773180

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 elementary steps underlying the mechanism of a catalytic reaction are also responsible for its rate under steady-state conditions. In special cases the rate will no longer be stationary, but may become oscillatory or even chaotic. These phenomena have to be ascribed to the nonlinear character of the coupled differential equations modelling the temporal behavior of the surface concentrations of the reacting species. As a consequence, these concentrations may also exhibit spatial differences, even on an a priori uniform single crystal surface, leading to spatiotemporal patterns such as propagating and standing waves as well as 'chemical' turbulence. Experimental evidence for these effects is presented for a particular system, the oxidation of CO on a Pt(110) surface.

引用

页码：219 / 230

页数：12

共 14 条

[1]

[Anonymous], 1979, ADV CATAL, DOI DOI 10.1016/S0360-0564(08)60133-9

[2] MECHANISMS OF SPATIAL SELF-ORGANIZATION IN ISOTHERMAL KINETIC OSCILLATIONS DURING THE CATALYTIC CO OXIDATION ON PT SINGLE-CRYSTAL SURFACES [J].