Controlled hydrodynamic conditions on the formation of iron oxide nanostructures synthesized by electrochemical anodization: Effect of the electrode rotation speed
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Controlled hydrodynamic conditions on the formation of iron oxide nanostructures synthesized by electrochemical anodization: Effect of the electrode rotation speed

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Controlled hydrodynamic conditions on the formation of iron oxide nanostructures synthesized by electrochemical anodization: Effect of the electrode rotation speed

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dc.contributor.author Lucas Granados, Bianca
dc.contributor.author Sánchez Tovar, Rita
dc.contributor.author Fernández Domene, Ramón Manuel
dc.contributor.author Garcia-Anton, Jose
dc.date.accessioned 2021-01-08T15:24:37Z
dc.date.available 2021-01-08T15:24:37Z
dc.date.issued 2017
dc.identifier.uri https://hdl.handle.net/10550/76918
dc.description.abstract Iron oxide nanostructures are of particular interest because they can be used as photocatalysts in water splitting due to their advantageous properties. Electrochemical anodization is one of the best techniques to synthesize nanostructures directly on the metal substrate (direct back contact). In the present study, a novel methodology consisting of the anodization of iron under hydrodynamic conditions is carried out in order to obtain mainly hematite (α-Fe2O3) nanostructures to be used as photocatalysts for photoelectrochemical water splitting applications. Different rotation speeds were studied with the aim of evaluating the obtained nanostructures and determining the most attractive operational conditions. The synthesized nanostructures were characterized by means of Raman spectroscopy, Field Emission Scanning Electron Microscopy, photoelectrochemical water splitting, stability against photocorrosion tests, Mott-Schottky analysis, Electrochemical Impedance Spectroscopy (EIS) and band gap measurements. The results showed that the highest photocurrent densities for photoelectrochemical water splitting were achieved for the nanostructure synthesized at 1000 rpm which corresponds to a nanotubular structure reaching ∼0.130 mA cm−2 at 0.54 V (vs. Ag/AgCl). This is in agreement with the EIS measurements and Mott-Schottky analysis which showed the lowest resistances and the corresponding donor density values, respectively, for the nanostructure anodized at 1000 rpm.
dc.language.iso eng
dc.relation.ispartof Applied Surface Science, 2017, vol. 392, p. 503-513
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Lucas Granados, Bianca Sánchez Tovar, Rita Fernández Domene, Ramón Manuel Garcia-Anton, Jose 2017 Controlled hydrodynamic conditions on the formation of iron oxide nanostructures synthesized by electrochemical anodization: Effect of the electrode rotation speed Applied Surface Science 392 503 513
dc.subject Nanoestructures
dc.subject Hidrodinàmica
dc.title Controlled hydrodynamic conditions on the formation of iron oxide nanostructures synthesized by electrochemical anodization: Effect of the electrode rotation speed
dc.type info:eu-repo/semantics/article
dc.date.updated 2021-01-08T15:24:37Z
dc.identifier.doi https://doi.org/10.1016/j.apsusc.2016.09.073
dc.identifier.idgrec 140771

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