Effects of ultrasonic impregnation combined with calcination in N2 atmosphere on the property of Co3O4/CeO2 composites for catalytic methane combustion
Co3O4/CeO2 composites with high surface areas and ultrafine crystalline sizes for catalytic combustion of methane were firstly prepared by a new sol-gel method which combined ultrasonic impregnation treatment and calcination in N2 atmosphere. The samples were characterized by various means such as n...
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Published in | Journal of energy chemistry Vol. 25; no. 3; pp. 387 - 392 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.05.2016
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Subjects | |
Online Access | Get full text |
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Summary: | Co3O4/CeO2 composites with high surface areas and ultrafine crystalline sizes for catalytic combustion of methane were firstly prepared by a new sol-gel method which combined ultrasonic impregnation treatment and calcination in N2 atmosphere. The samples were characterized by various means such as nitrogen adsorption/desorption, X-ray diffraction(XRD), H2 temperature-programmed reduction(H2-TPR),X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM). Results showed that the modified catalyst had the mesoporous structure, comparatively higher amount of surface oxygen and larger oxygen vacancies than others. As a result of the structure and surface composition merits, a high methane combustion conversion(50%) could be obtained at a low temperature of 262 °C for the modified Co3O4/CeO2 composites catalysts. The experimental results demonstrated that ultrasonic impregnation treatment combined with the N2 thermal treatment prior to calcination in air had a promising application for preparation of Co3O4/CeO2 composites catalysts for low-temperature catalytic combustion of methane. |
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Bibliography: | Hong Lu;Chengfa Jiang;Zhenwu Ding;Wei Wang;Wei Chu;Yanyan Feng;Department of Chemical Engineering, Sichuan University;Sichuan Provincial Engineering Technology Center for Environmental Protection Catalytic Materials 21-1585/O4 |
ISSN: | 2095-4956 |
DOI: | 10.1016/j.jechem.2016.01.012 |