Nanofacet-resolved CO oxidation kinetics on alumina- supported Pd particles

被引：30
|
作者：
Hoffmann, J
Schauermann, S
Hartmann, J
Zhdanov, VP
Kasemo, B
Libuda, J
Freund, HJ
机构：
[1] Max Planck Gesell, Fritz Haber Inst, Chem Phys Abt, D-14195 Berlin, Germany
[2] Chalmers Univ Technol, Dept Appl Phys, S-41296 Gothenburg, Sweden
[3] Russian Acad Sci, Boreskov Inst Catalysis, Novosibirsk 630090, Russia
来源：
CHEMICAL PHYSICS LETTERS | 2002年 / 354卷 / 5-6期
关键词：
D O I：
10.1016/S0009-2614(02)00151-3
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：
Employing a multi-molecular-beam approach, we have measured the angular distribution of CO, molecules formed during CO oxidation under steady-state conditions on well oriented and shaped nm-sized Pd crystallites grown on an ordered alumina film. The experiment is combined with kinetic Monte Carlo simulations based on a realistic structural model. The results obtained allow us (i) to differentiate between local reaction rates on the particle nanofacets and (ii) to conclude that oxygen diffusion on and between the (111) facets is rapid compared to reaction. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：403 / 408
页数：6
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