MgO-supported rhodium particles and films: Size, morphology, and reactivity

被引：14
作者：
Dudin, P. [1 ]
Barinov, A. [1 ]
Gregoratti, L. [1 ]
Scaini, D. [1 ]
He, Y. B. [2 ]
Over, H. [2 ]
Kiskinova, M. [1 ]
机构：
[1] Sincrotrone Trieste, I-34012 Basovizza Trieste, Italy
[2] Justus Liebig Univ, Dept Phys Chem, D-35392 Giessen, Germany
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 24期
关键词：
D O I：
10.1021/jp8017953
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 chemical transformations of supported Rh particles, ranging in size from a few micrometers to a few nanometers, and nanocrystalline Rh films have been studied under identical oxidizing and reduction conditions by means of scanning photoelectron microscopy (SPEM), which allows determination of the chemical state of single Rh microparticles. Comparing the oxidation states attained by the Rh particles revealed substantial reactivity differences with particle size, as well as variations in the reactivity of particles with similar dimensions and within the same particle. The results are interpreted in terms of the variable morphology of the particles as verified by secondary electron microscopy and atomic force microscopy.
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收藏
页码：9040 / 9044
页数：5
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