Shape-dependency activity of nanostructured CeO in the total oxidation of polycyclic aromatic hydrocarbons

Laura Torrente Murciano; A. Gilbank; B. Puertolas; T. Garcia; B. Solsona; D. Chadwick

doi:10.1016/j.apcatb.2012.10.030

Shape-dependency activity of nanostructured CeO in the total oxidation of polycyclic aromatic hydrocarbons

Laura Torrente Murciano, A. Gilbank, B. Puertolas, T. Garcia, B. Solsona, D. Chadwick

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Abstract

A morphological phase diagram is determined to relate the effect of base concentration and temperature during the hydrothermal synthesis with the final ceria nanostructured morphology. Representative samples of nanoparticles, nanorods and nanocubes have been characterized by XRD, N adsorption, TEM, XPS and Raman and catalytically tested for the total oxidation of naphthalene as a model polycyclic aromatic hydrocarbon. Ceria nanoparticles present the highest surface area and smallest crystalline size, leading to the most active of these structures. However if the catalytic activity is normalized by unit of surface area, the observed reactivity trend (nanorods<nanocubes<nanoparticles) is directly related to the concentration of surface oxygen vacancies as a result of the exposure of the (110) and (100) preferential planes.

Original language	English
Pages (from-to)	116-122
Number of pages	7
Journal	Applied Catalysis B: Environmental
Volume	132-133
DOIs	https://doi.org/10.1016/j.apcatb.2012.10.030
Publication status	Published - 27 Mar 2013

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10.1016/j.apcatb.2012.10.030

Effect of CeO2 nanostructure on VOC oxidaton v11_reviewed_PUREAccepted author manuscript, 3.19 MB

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title = "Shape-dependency activity of nanostructured CeO in the total oxidation of polycyclic aromatic hydrocarbons",

abstract = "A morphological phase diagram is determined to relate the effect of base concentration and temperature during the hydrothermal synthesis with the final ceria nanostructured morphology. Representative samples of nanoparticles, nanorods and nanocubes have been characterized by XRD, N adsorption, TEM, XPS and Raman and catalytically tested for the total oxidation of naphthalene as a model polycyclic aromatic hydrocarbon. Ceria nanoparticles present the highest surface area and smallest crystalline size, leading to the most active of these structures. However if the catalytic activity is normalized by unit of surface area, the observed reactivity trend (nanorods<nanocubes<nanoparticles) is directly related to the concentration of surface oxygen vacancies as a result of the exposure of the (110) and (100) preferential planes. ",

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T1 - Shape-dependency activity of nanostructured CeO in the total oxidation of polycyclic aromatic hydrocarbons

AU - Torrente Murciano, Laura

AU - Gilbank, A.

AU - Puertolas, B.

AU - Garcia, T.

AU - Solsona, B.

AU - Chadwick, D.

PY - 2013/3/27

Y1 - 2013/3/27

N2 - A morphological phase diagram is determined to relate the effect of base concentration and temperature during the hydrothermal synthesis with the final ceria nanostructured morphology. Representative samples of nanoparticles, nanorods and nanocubes have been characterized by XRD, N adsorption, TEM, XPS and Raman and catalytically tested for the total oxidation of naphthalene as a model polycyclic aromatic hydrocarbon. Ceria nanoparticles present the highest surface area and smallest crystalline size, leading to the most active of these structures. However if the catalytic activity is normalized by unit of surface area, the observed reactivity trend (nanorods<nanocubes<nanoparticles) is directly related to the concentration of surface oxygen vacancies as a result of the exposure of the (110) and (100) preferential planes.

AB - A morphological phase diagram is determined to relate the effect of base concentration and temperature during the hydrothermal synthesis with the final ceria nanostructured morphology. Representative samples of nanoparticles, nanorods and nanocubes have been characterized by XRD, N adsorption, TEM, XPS and Raman and catalytically tested for the total oxidation of naphthalene as a model polycyclic aromatic hydrocarbon. Ceria nanoparticles present the highest surface area and smallest crystalline size, leading to the most active of these structures. However if the catalytic activity is normalized by unit of surface area, the observed reactivity trend (nanorods<nanocubes<nanoparticles) is directly related to the concentration of surface oxygen vacancies as a result of the exposure of the (110) and (100) preferential planes.

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Shape-dependency activity of nanostructured CeO in the total oxidation of polycyclic aromatic hydrocarbons

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Stabilzation of Metal Nanoparticles

MC2-Electron Microscopy (EM)

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Shape-dependency activity of nanostructured CeO in the total oxidation of polycyclic aromatic hydrocarbons

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Stabilzation of Metal Nanoparticles

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MC2-Electron Microscopy (EM)

MC2- X-ray diffraction (XRD)

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