Effect of the surface area of cobaltic oxide on carbon monoxide oxidation
Resource
Catalysis Letters 101 (1-2): 59-63
Journal
Catalysis Letters
Pages
59-63
Date Issued
2005
Date
2005
Author(s)
Wang, Chen-Bin
Tang, Chih-Wei
Gau, Shiue-Jiun
Chien, Shu-Hua
Abstract
Various surface area (S BET) of cobaltic oxide (Co 3O4) are prepared by different methods, i.e., precipitation-oxidation, impregnation and hydrothermal. The effect of S BET of Co3O4 on the catalytic property toward CO oxidation is investigated. The results indicate that the optimum S BET of Co3O4 could increase the catalytic activity. Characterization of the cobaltic oxide using X-ray diffraction (XRD), N2-adsorption at -196 °C, infrared (IR) and temperature- programmed reduction (TPR) reveals that the increase of S BET on Co3O4 can weaken the bond strength of Co-O and promote more lattice oxygen desorption from Co3O4 to cause the reduction become easy. We conclude that the S BET effect, caused by various prepared methods and refined conditions, are responsible for the activity enhancement of Co3O4. The T 50 (the conversion of CO reached 50%) is decreased significantly when the S BET is increased, i.e., PO-R230 > PO-C400 > I-C550 > H-150 ~D-Strem. © 2005 Springer Science+Business Media, Inc.
Various surface area (S BET) of cobaltic oxide (Co 3O4) are prepared by different methods, i.e., precipitation-oxidation, impregnation and hydrothermal. The effect of S BET of Co3O4 on the catalytic property toward CO oxidation is investigated. The results indicate that the optimum S BET of Co3O4 could increase the catalytic activity. Characterization of the cobaltic oxide using X-ray diffraction (XRD), N2-adsorption at -196 °C, infrared (IR) and temperature- programmed reduction (TPR) reveals that the increase of S BET on Co3O4 can weaken the bond strength of Co-O and promote more lattice oxygen desorption from Co3O4 to cause the reduction become easy. We conclude that the S BET effect, caused by various prepared methods and refined conditions, are responsible for the activity enhancement of Co3O4. The T 50 (the conversion of CO reached 50%) is decreased significantly when the S BET is increased, i.e., PO-R230 > PO-C400 > I-C550 > H-150 ~D-Strem. © 2005 Springer Science+Business Media, Inc.
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