Journal ArticleDOI
Catalytic decomposition of N2O over CeO2 promoted CO3O4 spinel catalyst
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A series of CeO2 promoted cobalt spinel catalysts were prepared by the co-precipitation method and tested for the decomposition of nitrous oxide (N2O) as mentioned in this paper.Abstract:
A series of CeO2 promoted cobalt spinel catalysts were prepared by the co-precipitation method and tested for the decomposition of nitrous oxide (N2O). Addition of CeO2 to Co3O4 led to an improvement in the catalytic activity for N2O decomposition. The catalyst was most active when the molar ratio of Ce/Co was around 0.05. Complete N2O conversion could be attained over the CoCeO.05 catalyst below 400 degrees C even in the presence of O-2, H2O or NO. Methods of XRD, FE-SEM, BET, XPS, H-2-TPR and O-2-TPD were used to characterize these catalysts. The analytical results indicated that the addition of CeO2 could increase the surface area Of Co3O4, and then improve the reduction of Co3+ to Co2+ by facilitating the desorption of adsorbed oxygen species, which is the rate-determining step of the N2O decomposition over cobalt spinel catalyst. We conclude that these effects, caused by the addition of CeO2, are responsible for the enhancement of catalytic activity Of Co3O4. (c) 2007 Elsevier B.V. All rights reserved.read more
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Journal ArticleDOI
Mesoporous Co3O4 and Au/Co3O4 Catalysts for Low-Temperature Oxidation of Trace Ethylene
Chunyan Ma,Zhen Mu,Jinjun Li,Yonggang Jin,Jie Cheng,Gao Qing Lu,Zhengping Hao,Shi-Zhang Qiao +7 more
TL;DR: Results indicated that the crystal facet of Co(3)O(4) played an essential role in determining its catalytic oxidation performance, and was significantly more active for ethylene oxidation than the Co( 3)O (4) nanosheets.
Journal ArticleDOI
Mesoporous Co3O4–CeO2 and Pd/Co3O4–CeO2 catalysts: Synthesis, characterization and mechanistic study of their catalytic properties for low-temperature CO oxidation
TL;DR: In this paper, two different reaction pathways over Co(3)O(4)-CeO(2) and Pd/Co(3,O,4)-Co(2), with varying compositions were proposed.
Journal ArticleDOI
Comparison of the performance for oxidation of formaldehyde on nano-Co3O4, 2D-Co3O4, and 3D-Co3O4 catalysts
TL;DR: The 3D-Co 3 O 4 has the best performance of formaldehyde oxidation due to the three-dimensional porous channel structure, larger specific surface area, abundant active surface oxygen species and active Co 3+ cationic species on the exposed (2.2.0) crystal face as discussed by the authors.
Journal ArticleDOI
Highly Active and Stable Co3O4/ZSM-5 Catalyst for Propane Oxidation: Effect of the Preparation Method
TL;DR: In this paper, the catalytic performance of Co3O4/ZSM-5 was investigated for the total oxidation of propane and their physicochemical properties were investigated by low-temperature N2 adsorption, XRD, FT-IR absorption spectroscopy, XPS, H2-TPR, TEM, and CO chemisorption.
Journal ArticleDOI
Co3O4 nanocrystals and Co3O4–MOx binary oxides for CO, CH4 and VOC oxidation at low temperatures: a review
TL;DR: A comprehensive review of the state-of-the-art activities that concentrate on the synthesis, structural properties and catalytic applications of Co3O4 nanocrystals and Co 3O4-MOx binary oxides in CO, CH4 and VOC oxidation at low temperatures is provided in this paper.
References
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Journal ArticleDOI
Catalytic Properties of Ceria and CeO2-Containing Materials
TL;DR: A survey of the use of cerium oxide and CeO2-containing materials as oxidation and reduction catalysts is presented in this paper, with a special focus on catalytic interaction with small molecules such as hydrogen, carbon monoxide, oxygen, and nitric oxide.
Journal ArticleDOI
Heterogeneous catalytic decomposition of nitrous oxide
TL;DR: An overview of the ongoing activities in the area of the decomposition of nitrous oxide over solid catalysts is given in this paper, focusing on the role of surface oxygen, the inhibition by molecular oxygen, water and other species, poisoning phenomena and practical developments.
Journal ArticleDOI
Ce 3d XPS study of composite CexMn1 xO2 y wet oxidation catalysts
TL;DR: In this article, X-ray photoelectron spectroscopy (XPS) was used to investigate the valence state of cerium in unsupported composite Ce x Mn 1− x O 2− y catalysts.
Journal ArticleDOI
Formation and control of N2O in nitric acid production: Where do we stand today?
TL;DR: In this paper, the state-of-the-art for N2O control in the nitric acid manufacture is presented, and several options for reducing its emissions are discussed, depending on the position in the process.