Gold nanoparticles supported on ceria-modified mesoporous–macroporous binary metal oxides as highly active catalysts for low-temperature water–gas shift reaction

被引:0
|
作者
V. Idakiev
T. Tabakova
K. Tenchev
Z. Y. Yuan
T. Z. Ren
A. Vantomme
B. L. Su
机构
[1] Bulgarian Academy of Sciences,Institute of Catalysis
[2] Nankai University,Institute of New Catalytic Materials Science, College of Chemistry
[3] Hebei University of Technology,School of Chemical Engineering
[4] The University of Namur (FUNDP),Laboratory of Inorganic Materials Chemistry
来源
Journal of Materials Science | 2009年 / 44卷
关键词
Ceria; Gold Catalyst; TiZr; Binary Metal Oxide; Single Metal Oxide;
D O I
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中图分类号
学科分类号
摘要
New gold catalytic system prepared on ceria-modified meso-/macroporous binary metal oxide support (CeO2/TiO2–ZrO2) and used as water–gas shift reaction (WGSR) catalyst is reported. The support was prepared through the surfactant templating technique combining with the use of mixed alkoxide solutions. Ceria-modifying additive and gold were deposited consecutively on the meso-/macroporous TiO2–ZrO2 by deposition-precipitation method. The samples were characterized by powder X-ray diffraction, scanning and transmission electron microscopy, N2 adsorption analysis, and temperature-programmed reduction. The catalytic activity of the new gold-based catalysts was evaluated in WGSR and it was compared with that of gold catalysts supported on simple and binary mesoporous oxides (TiO2, ZrO2, and TiO2–ZrO2) and ceria-modified mesoporous titania support (CeO2/mTiO2). A high degree of synergistic interaction between ceria and support and a positive modification of structural and catalytic properties have been achieved. The new gold catalytic system is found to be a promising catalyst for practical WGSR application.
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页码:6637 / 6643
页数:6
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