Highly Reducible Nanostructured CeO2 for CO Oxidation

被引：16

作者：

Feng, Gang ^{[1
]}

Han, Weining ^{[1
]}

Wang, Zhimiao ^{[1
]}

Li, Fang ^{[1
]}

Xue, Wei ^{[1
]}

机构：

[1] Hebei Univ Technol, Sch Chem Engn & Technol, Hebei Prov Key Lab Green Chem Technol & High Effi, Tianjin 300130, Peoples R China

来源：

CATALYSTS | 2018年 / 8卷 / 11期

关键词：

ceria; morphology; catalyst; CO oxidation; surface oxygen species; WATER-GAS SHIFT; CERIA NANOPARTICLES; CATALYTIC-ACTIVITY; NANOTUBES; PROPERTY; NANORODS;

D O I：

10.3390/catal8110535

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：

Ceria in nanoscale with different morphologies, rod, tube and cube, were prepared through a hydrothermal process. The structure, morphology and textural properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and isothermal N-2 adsorption-desorption. Ceria with different morphologies were evaluated as catalysts for CO oxidation. CeO2 nanorods showed superior activity to the others. When space velocity was 12,000 mL.gcat(-1).h(-1), the reaction temperature for 90% CO conversion (T-90) was 228 degrees C. The main reason for the high activity was the existence of large amounts of easily reducible oxygen species, with a reduction temperature of 217 degrees C on the surface of CeO2 nanorods. Another cause was their relatively large surface area.

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页数：10

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