Support dependence of MeOH decomposition over size-selected Pt nanoparticles

被引：73
|
作者：
Croy, Jason R.
Mostafa, Simon
Liu, Jing
Sohn, Yongho
Heinrich, Helge
Roldan Cuenya, Beatriz [1 ]
机构：
[1] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA
[2] Univ Cent Florida, Ctr Adv Mat Processing & Characterization, Orlando, FL 32816 USA
来源：
CATALYSIS LETTERS | 2007年 / 119卷 / 3-4期
基金：
美国国家科学基金会;
关键词：
Pt nanoparticles; oxide supports; methanol; CeO2; TiO2; ZrO2; SiO2; Al2O3; XPS; AFM; TEM; mass flow reactor;
D O I：
10.1007/s10562-007-9236-0
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：
We present here the decomposition of methanol over Pt nanoparticles supported on a series of oxide powders. The samples tested may be roughly grouped in two categories consisting of large (similar to 15-18 nm) and small (similar to 8-9 nm) Pt particles deposited on reducible (CeO2, TiO2) and non-reducible (SiO2, ZrO2, Al2O3) supports. The smallest particles (similar to 8 nm), deposited on ZrO2, were found to be cationic and the most active for the decomposition of methanol. Furthermore, the stability of metallic Pt and its oxides was observed to be dependent on the choice of support. In all Pt containing samples the reaction proceeds via he direct decomposition of methanol, as no significant amounts of by-products were detected in the experimental range of 100-300 degrees C.
引用
收藏
页码：209 / 216
页数：8
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