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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.citation	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.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.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	journal article	es_ES
dc.date.updated	2021-01-08T15:24:37Z
dc.identifier.doi	10.1016/j.apsusc.2016.09.073
dc.identifier.idgrec	140771
dc.rights.accessRights	open access	es_ES