Size-dependent heterogeneous catalytic kinetics

被引：55

作者：

Murzin, Dmitry Yu. ^{[1
]}

机构：

[1] Abo Akad Univ, Turku, Finland

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2010年 / 315卷 / 02期

关键词：

Nanocatalysis; Thermodynamics; Kinetics; INTERFACE ENERGY; ADSORPTION; THERMODYNAMICS; MOLECULES;

D O I：

10.1016/j.molcata.2009.09.016

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 quantitative thermodynamic approach is considered with the aim to describe the size-dependent Langmuir-Hinshelwood mechanism and the two-step catalytic cycle. The general treatment takes into account surface energy excess due to an intrinsic increase in chemical potential with size decrease as well as the changes in chemical potential upon adsorption. Numerical simulations as well as quantitative analysis show that for catalytic reactions over nanoparticles not only the rates but also reaction orders can vary depending on the size of nanoclusters. Comparison with experimental data is given (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：226 / 230

页数：5

共 29 条

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