Catalytic properties of nanostructured Pt and Ru metal clusters over alumina promoted by CeO2

被引：8
|
作者：
Dossumov, K. [1 ]
Salakhova, R. Kh. [1 ]
Popova, N. M. [1 ]
Tungatarova, S. A. [1 ]
Grigorieva, V. P. [1 ]
Komashko, L. V. [1 ]
Sass, A. S. [1 ]
机构：
[1] DV Sokolsky Inst Organ Catalysis & Elect Chem, Alma Ata 050010, Kazakhstan
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 434卷 / SPEC. ISS.期
关键词：
clusters; metals; nanostructures; X-ray diffraction; transmission electron microscopy;
D O I：
10.1016/j.jallcom.2006.08.187
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：
0.5%Pt-0.5%Ru/2%Ce/(theta + alpha)-Al2O3, reduced by H-2, at 1173 K, presents a mixture of Pt and Ru (3-30 nm) nanoparticles in reduced and partially oxidised condition surrounded by larger formations of surface compound CeAlO3 with perovskite structure and oxide Ce6O11 (15-80 nm). High conversion of CH4 and selectivity for CO and H-2 (close to 100%) at short contact times (2.35-8 x 10(-3) s) are observed by using that catalyst in catalytic partial oxidation of CH4 to synthesis-gas at 1173 K and atmospheric pressure. Methane is activated on Pt and Ru metal clusters while oxygen is activated on Ce oxide nanostructures. (C) 2006 Published by Elsevier B.V.
引用
收藏
页码：796 / 798
页数：3
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