Wireless electrochemical fabrication of tungsten oxide nanoporous layers in closed bipolar cells

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dc.contributor.authorSepúlveda Sepúlveda, Lina Marcelacs
dc.contributor.authorBaishya, Kaushikcs
dc.contributor.authorRodriguez Pereira, Jhonatancs
dc.contributor.authorČičmancová, Veronikacs
dc.contributor.authorHromádko, Luděkcs
dc.contributor.authorMacák, Jancs
dc.coverage.issue7cs
dc.coverage.volume176cs
dc.date.accessioned2025-07-16T13:56:14Z
dc.date.available2025-07-16T13:56:14Z
dc.date.issued2025-07-01cs
dc.description.abstractIn this work, the anodization of tungsten (W) foils using closed bipolar electrochemical cells is demonstrated for the first time. The anodization was done using three different electrolytes: (1) 1 M NH4NO3, 1 wt%. H2O in ethylene glycol (EG); (2) 1 M (NH4)2SO4, 75 mM NH4F in H2O; and (3) 170 mM NH4 1.5 wt%. H2O in EG. Different square-wave potentials and frequencies were applied during the anodization. Among the tested electrolytes, electrolyte 1 produced the most well-defined and homogeneous WO3 nanoporous (NP) layers. X-ray photoelectron spectroscopy confirmed the presence of multiple W oxidation states on the WO3 NP layers using electrolytes 1 and 2, with W6+ and W5+ being the dominant species. The results demonstrate well-defined WO3 NP layers with a high W6+ species concentration and less than 10 at.% W5+ is achieved using electrolyte 1. These findings provide valuable insights into the relationship between the electrolyte composition, W oxidation states, and the morphology of WO3 NP layers.en
dc.formattextcs
dc.format.extent1-7cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationELECTROCHEMISTRY COMMUNICATIONS. 2025, vol. 176, issue 7, p. 1-7.en
dc.identifier.doi10.1016/j.elecom.2025.107963cs
dc.identifier.issn1873-1902cs
dc.identifier.orcid0000-0001-6910-8560cs
dc.identifier.orcid0000-0001-7091-3022cs
dc.identifier.other198232cs
dc.identifier.scopus55655855500cs
dc.identifier.urihttps://hdl.handle.net/11012/255169
dc.language.isoencs
dc.publisherELSEVIER SCIENCE INCcs
dc.relation.ispartofELECTROCHEMISTRY COMMUNICATIONScs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S138824812500102Xcs
dc.rightsCreative Commons Attribution-NonCommercial 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1873-1902/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/cs
dc.subjectAnodizationen
dc.subjectBipolar electrochemistryen
dc.subjectClosed cellen
dc.subjectTungstenen
dc.subjectWO3en
dc.subjectNanoporousen
dc.titleWireless electrochemical fabrication of tungsten oxide nanoporous layers in closed bipolar cellsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-198232en
sync.item.dbtypeVAVen
sync.item.insts2025.07.16 15:56:14en
sync.item.modts2025.07.16 15:32:57en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé nízkodimenzionální nanomateriálycs
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