Catalytically Stable and Active CeO<sub>2</sub> Mesoporous Spheres

Liang, Xin; Xiao, Junjia; Chen, Biaohua; Li, Yadong

doi:10.1021/ic100795p

Cited by 136 publications

(102 citation statements)

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“…under oxidizing and reducing conditions, respectively [2,3]. However, the CeO 2 is not a promising candidate for catalytic samples mainly due to its low catalytic activities [4][5][6][7][8][9]. Numerous reports have shown that the activity of ceria in total oxidation reactions is greatly enhanced by transitional metals like Co, Cu, Ti, Ni, and so on [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

Deng

Chen

et al. 2015

Catal Lett

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Three-dimensional macro/mesoporous Co 3 O 4 -CeO 2 was prepared via a facile self-sustained decomposition of metal-organic complexes. Porous Co 3 O 4 -CeO 2 was characterized using X-ray diffraction, scanning electron microscopy/-transmission electron microscopy imaging, N 2 adsorption/ desorption and X-ray photoelectron spectroscopy to examine the morphology and microstructure to find out the cause. Co 3 O 4 -CeO 2 with the 3D hierarchical porous structure consisting of nanoparticles is a coral-like shape with a size of tens of micrometers and exhibits the hierarchically porous morphology, in which the walls of the macropores contain smaller mesopores. The catalytic performance of the porous Co 3 O 4 -CeO 2 for CO oxidation has been studied. Among the obtained catalysts, the porous Co 3 O 4 -CeO 2 with 20 wt% Co exhibits the best catalytic activity and the 50 % CO conversion can be reached at 74°C. The presence of transition metal element Co can promote the production of oxygen vacancies and improve oxygen mobility, which result in enhancing the oxygen-storage capacity of porous Co 3 O 4 -CeO 2 and its catalytic performance for CO conversion. Graphical Abstract& Yude Wang

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Section: Introductionmentioning

confidence: 99%

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

Deng

Chen

et al. 2015

Catal Lett

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“…Numerous CeO 2 synthesis procedures have been reported in literature [10][11][12][13] leading to various nanoparticle morphologies. These materials were extensively studied owing to their many distinctive characteristics and applications such as catalysts in the fuel cell technology [14], gas sensor [15], catalytic wet oxidation [16][17], oxygen storage and release [18], wastewater treatment [19] or photo-catalytic oxidation of water [20].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Incorporation of CeO2 Nanoparticles on the Ion Exchange Behavior of Dodecylsulfate Doped Polypyrrole Films: Ac-Electrogravimetry Investigations

Benmouhoub

Agrisuelas

Benbrahim

et al. 2014

Electrochimica Acta

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Cerium oxide (CeO 2 ) nanoparticles (NPs) possessing defined size and crystallinity have been synthesised by a co-precipitation method. The effect of several parameters, such as the nature of the solvent and the calcination process, on the crystallite size was studied by XRD, TEM and BET methods. These CeO 2 nanoparticles were then incorporated in dodecylsulfate (DS) doped PPy films during their electrodeposition in potentiodynamic conditions in order to produce PPy-DS/CeO 2 NPs nanocomposite thin films on gold coated quartz crystals. Simultaneous EQCM experiments revealed successful incorporation of increasing amounts of cerium oxide nanoparticles in the polypyrrole matrix during each of the consecutive CV scans. This was confirmed using FEG-SEM and EDS microanalysis.The ion exchange phenomena occurring in the resulting nanocomposite materials were studied by ac-electrogravimetry in NaCl aqueous electrolyte. PPy-DS films appear to be mainly cation exchangers, independently from the incorporation of CeO 2 nanoparticles (NPs) even though chloride anions in smaller amounts, and free water molecules, are 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 2 simultaneously transferred at the film/electrolytic solution interface. This study also reveals that the kinetics of Cl  ion insertion occurring at the film/electrolyte interface upon oxidation is persistently slower in PPy-DS/CeO 2 NPs films than in PPy-DS films throughout the entire potential window of investigation. However, the relative concentration changes of Cl  ions in PPy-DS/CeO 2 NPs films is about two times greater than that occurring in pristine PPy-DS films. Such conclusion tends to demonstrate that CeO 2 NPs have the ability to modify the morphology of electrodeposited PPy-DS thin films as well as their subsequent permeability towards ions contained in the electrolytic solution, possibly via the perturbation of polymer chain interactions and organisation. *Revised Manuscript (including Abstract) Click here to view linked References

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“…Recently, it is reported that nanosized ceria show pH dependent oxidase activity, which can quickly oxidize a series of organic substrates [36,37]. The results provide new insights into the applications of ceria nanomaterials in medical diagnosis and biosensing.…”

Section: Introductionmentioning

confidence: 94%

Magnetic colorimetric immunoassay for human interleukin-6 based on the oxidase activity of ceria spheres

Peng

Guan

Yao

et al. 2016

Analytical Biochemistry

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Catalytically Stable and Active CeO₂ Mesoporous Spheres

Abstract: A facile one-step strategy has been developed for preparing monodisperse CeO(2) mesoporous spheres with high surface areas, uniform size distributions, and well-defined pore topologies. These mesoporous spheres have been demonstrated to be catalytically stable and active for CO oxidation.

Cited by 136 publications

References 20 publications

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

Influence of the Incorporation of CeO2 Nanoparticles on the Ion Exchange Behavior of Dodecylsulfate Doped Polypyrrole Films: Ac-Electrogravimetry Investigations

Magnetic colorimetric immunoassay for human interleukin-6 based on the oxidase activity of ceria spheres

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Catalytically Stable and Active CeO2 Mesoporous Spheres

Abstract: A facile one-step strategy has been developed for preparing monodisperse CeO(2) mesoporous spheres with high surface areas, uniform size distributions, and well-defined pore topologies. These mesoporous spheres have been demonstrated to be catalytically stable and active for CO oxidation.

Cited by 136 publications

References 20 publications

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

Influence of the Incorporation of CeO2 Nanoparticles on the Ion Exchange Behavior of Dodecylsulfate Doped Polypyrrole Films: Ac-Electrogravimetry Investigations

Magnetic colorimetric immunoassay for human interleukin-6 based on the oxidase activity of ceria spheres

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Catalytically Stable and Active CeO₂ Mesoporous Spheres