Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 132, Issue -, Pages 116-122Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2012.10.030
Keywords
Ceria; Nanotubes; Nanorods; Nanocubes; Nanostructures; Catalytic total oxidation; VOC; Naphthalene; Morphological diagram
Funding
- EPSRC (UK)
- Plan E through project [ENE2009-11353]
- Ministry of Science and Innovation (Spain)
- EPSRC [EP/E009999/1, EP/K016334/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E009999/1, EP/K016334/1] Funding Source: researchfish
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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-2 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 (1 1 0) and (1 0 0) preferential planes. (C) 2012 Elsevier B.V. All rights reserved.
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