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Study of the annealing conditions and photoelectrochemical characterization of a new iron oxide bi-layered nanostructure for water splitting

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Study of the annealing conditions and photoelectrochemical characterization of a new iron oxide bi-layered nanostructure for water splitting

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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	2021-01-12T14:22:02Z
dc.date.available	2021-01-12T14:22:02Z
dc.date.issued	2016
dc.identifier.citation	Lucas Granados, Bianca Sánchez Tovar, Rita Fernández Domene, Ramón Manuel Garcia-Anton, Jose 2016 Study of the annealing conditions and photoelectrochemical characterization of a new iron oxide bi-layered nanostructure for water splitting Solar Energy Materials and Solar Cells 153 68 77
dc.identifier.uri	https://hdl.handle.net/10550/77014
dc.description.abstract	Iron oxide nanostructures have emerged as promising materials for being used as photocatalysts for hydrogen production due to their advantageous properties. However, their low carrier mobility and short hole diffusion length limit their efficiency in water splitting. To overcome these drawbacks, in the present study, we synthetized a new hematite (α-Fe2O3) bi-layered nanostructure consisting of a top nanosphere layer and a nanotubular underneath one by electrochemical anodization. Annealing parameters such as temperature, heating rate and atmosphere were studied in detail in order to determine the optimum annealing conditions for the synthetized nanostructure. The obtained new bi-layered nanostructure was characterized by Field Emission Scanning Electron Microscopy, Raman Spectroscopy, Mott-Schottky analysis and Electrochemical Impedance Spectroscopy. The results show the best water splitting performance for the bi-layered nanostructure annealed in argon atmosphere at 500 °C at a heating rate of 15 °C min−1 achieving a photocurrent density of ~0.143 mA cm−2 at 1.54 V (vs. RHE). The results indicate that the bi-layered nanostructure is an efficient photocatalyst for applications such as water splitting.
dc.language.iso	eng
dc.relation.ispartof	Solar Energy Materials and Solar Cells, 2016, vol. 153, p. 68-77
dc.subject	Nanoestructures
dc.subject	Electroquímica
dc.title	Study of the annealing conditions and photoelectrochemical characterization of a new iron oxide bi-layered nanostructure for water splitting
dc.type	journal article	es_ES
dc.date.updated	2021-01-12T14:22:02Z
dc.identifier.doi	10.1016/j.solmat.2016.04.005
dc.identifier.idgrec	140767
dc.rights.accessRights	open access	es_ES