Low Temperature CO Oxidation over Cobalt Catalysts Supported on Mesoporous CeO₂

Abstract:

Mesoporous CeO2 was first synthesized by hydrothermal method, and then used to synthesize different content of (Co3O4)x/CeO2 (x was the molar ratio of Cu and Co) by deposition-precipitation method. The fresh and doped catalysts were characterized by X-ray diffraction (XRD), N2 adsorption and desorption, H2 temperature programmed reduction (H2-TPR) and O2 temperature programmed desorption (O2-TPD) to study the crystal structure, surface area, and the mechanism of CO oxidation. The results show that: In XRD pattems, the doped cobalt amounts of samples from x=20% to x=100% have Co3O4 crystal structure. The N2 adsorption and desorption indicated the samples were mesoporous structure. Compared with other samples, the better reducibility and activity oxygen species of (Co3O4)50%/CeO2 coincided with its better catalytic activity.

• Periodical: Advanced Materials Research (Volume 643)
• Pages: 76-82
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.643.76
• Online since: January 2013
• Authors: Jun Jie Tian, Wei Na, Hua Wang, Wen Gui Gao
• Keywords: Cetyl Trimethyl Ammonium Bromide (CTAB), CO Oxidation, Co₃O₄/CeO₂, Mesoporous CeO₂

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