Size distribution of cobalt particles in catalysts for the Fischer-Tropsch synthesis

被引：26

作者：

Chernavskii, PA ^{[1
]}

Pankina, GV ^{[1
]}

Lermontov, AS ^{[1
]}

Lunin, VV ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia

来源：

KINETICS AND CATALYSIS | 2003年 / 44卷 / 05期

关键词：

D O I：

10.1023/A:1026146123264

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 effect of the size distribution of metal particles on the process kinetics was studied for the oxidation and reduction of cobalt nanoparticles (6-10 nm) in the Co/SiO2, Co/Al2O3, and Co/ZrO2 systems in both isothermic and temperature-programmed regimes in the temperature range from 280 to 500 K. The average size of the cobalt particles was estimated by measurements of the coercive force and residual magnetization using a vibration magnetometer. It was found that the average particle size increases upon cobalt oxidation and decreases upon cobalt reduction due to changes in the fraction of nonsuperparamagnetic particles with sizes of at least 6.5 nm.

引用

页码：657 / 661

页数：5

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