Kinetics of desorption from heterogeneous surfaces

被引:8
作者
Cerofolini, GF [1 ]
Re, N [1 ]
机构
[1] UNIV PERUGIA,DIPARTIMENTO CHIM,I-06100 PERUGIA,PG,ITALY
关键词
D O I
10.1021/la950813e
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The desorption kinetics from heterogeneous surfaces contain information on energy heterogeneity. Mathematical methods for extracting the energy distribution function from desorption kinetics are developed. The overall desorption kinetics are described as weighted averages of the local desorption kinetics from each energetically homogeneous zone forming the surface. Whatever the local kinetics, the energy distribution is determined from the overall kinetics by using the condensation approximation. The method is applied to two situations: the time-logarithm law observed in a lot of systems of practical interest in catalysis, and the time-power law observed in many relaxation kinetics of macromolecules.
引用
收藏
页码:990 / 994
页数:5
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