Comparison of Different Synthetic Routes of Hybrid Hematite-TiO<sub>2</sub> Nanotubes-Based Electrodes

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dc.contributor.authorFornazari, Ana Luiza
dc.contributor.authorCastillo-Rodriguez, Judith
dc.contributor.authorCorrea-Encalada, Daniel
dc.contributor.authorDalchiele, Enrique A.
dc.contributor.authorHevia, Samuel A.
dc.contributor.authordel Rio, Rodrigo
dc.date.accessioned2025-01-20T22:09:31Z
dc.date.available2025-01-20T22:09:31Z
dc.date.issued2021
dc.description.abstractNowadays, green hydrogen is an important niche of interest in which the search for a suitable composite material is indispensable. In this sense, titanium oxide nanotubes (TiO2 nanotube, TNTs) were prepared from double anodic oxidation of Ti foil in ethylene glycol electrolyte. The morphology of the nanotubes was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Once characterized, nanotubes were used as templates for the deposition of hematite. The use of three synthetic procedures was assayed: Chemical Vapor Deposition (CVD), Successive Ionic Layer Adsorption and Reaction (SILAR), and electrochemical synthesis. In the first case, CVD, the deposition of hematite onto TiO2 yielded an uncovered substrate with the oxide and a negative shift of the flat band potential. On the other hand, the SILAR method yielded a considerable amount of hematite on the surface of nanotubes, leading to an obstruction of the tubes in most cases. Finally, with the electrochemical synthesis, the composite material obtained showed great control of the deposition, including the inner surface of the TNT. In addition, the impedance characterization showed a negative shift, indicating the changes of the interface electrode-electrolyte due to the modification with hematite. Finally, the screening of the methods showed the electrochemical synthesis as the best protocol for the desired material.
dc.fuente.origenWOS
dc.identifier.doi10.3390/ma14164501
dc.identifier.eissn1996-1944
dc.identifier.urihttps://doi.org/10.3390/ma14164501
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94334
dc.identifier.wosidWOS:000689447400001
dc.issue.numero16
dc.language.isoen
dc.revistaMaterials
dc.rightsacceso restringido
dc.subjectTiO2 nanotubes
dc.subjecthematite
dc.subjectelectrochemistry
dc.subjectSILAR
dc.subjectCVD
dc.titleComparison of Different Synthetic Routes of Hybrid Hematite-TiO<sub>2</sub> Nanotubes-Based Electrodes
dc.typeartículo
dc.volumen14
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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