Size-controlled synthesis of platinum nanoparticles supported on γ-Al2O3 and their thermal stability

被引：2
|
作者：
Kaidanovych, Z. V. [1 ]
Kalishyn, Ye. Yu. [1 ]
Strizhak, P. E. [1 ]
机构：
[1] Natl Acad Sci Ukraine, LV Pisarzhevskii Inst Phys Chem, UA-03028 Kiev, Ukraine
来源：
THEORETICAL AND EXPERIMENTAL CHEMISTRY | 2013年 / 48卷 / 06期
关键词：
platinum nanoparticles; sintering; Pt/gamma-Al2O3; PARTICLE-SIZE; NM; HYDROGENATION; NANOCRYSTALS;
D O I：
10.1007/s11237-013-9284-z
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Feasibility was demonstrated for the preparation of Pt/gamma-Al2O3 by precipitation of size-controlled platinum nanoparticles with narrow size distribution from colloidal solutions. The size and size distribution of the nanoparticles supported on gamma-Al2O3 were found to remain unchanged upon precipitation. X-ray phase analysis showed that platinum is oxidized to give PtO2 upon raising the sintering temperature from 120 to 300 A degrees C. The oxide formed is completely decomposed above 500 A degrees C. Marked enlargement of the supported nanoparticles occurs above 400 A degrees C. Aggregation along with increasing size of the nanoparticles is observed above 700 A degrees C.
引用
收藏
页码：376 / 380
页数：5
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