Anodic Oxidation of Tungsten under Illumination-Multi-Method Characterization and Modeling at the Molecular Level

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creativework.keywordsanodic oxidation, electrochemical impedance spectroscopy, intensity modulated photocurrent spectroscopy, kinetic model, tungsten oxide
creativework.publisherMultidisciplinary Digital Publishing Institute (MDPI)en
dc.contributor.authorBojinov M.
dc.contributor.authorPenkova Y.
dc.contributor.authorBetova I.
dc.contributor.authorKarastoyanov V.
dc.date.accessioned2024-07-10T14:27:06Z
dc.date.accessioned2024-07-10T14:51:04Z
dc.date.available2024-07-10T14:27:06Z
dc.date.available2024-07-10T14:51:04Z
dc.date.issued2023-11-01
dc.description.abstractTungsten oxide has received considerable attention as photo-anode in photo-assisted water splitting due to its considerable advantages such as significant light absorption in the visible region, good catalytic properties, and stability in acidic and oxidative conditions. The present paper is a first step in a detailed study of the mechanism of porous WO3 growth via anodic oxidation. In-situ electrochemical impedance spectroscopy (EIS) and intensity modulated photocurrent spectroscopy (IMPS) during oxidation of W illuminated with UV and visible light are employed to study the ionic and electronic processes in slightly acidic sulfate-fluoride electrolytes and a range of potentials 4–10 V. The respective responses are discussed in terms of the influence of fluoride addition on ionic and electronic process rates. A kinetic model is proposed and parameterized via regression of experimental data to the EIS and IMPS transfer functions.
dc.identifier.doi10.3390/molecules28217387
dc.identifier.issn1420-3049
dc.identifier.scopusSCOPUS_ID:85176563289en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/880
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85176563289&origin=inward
dc.titleAnodic Oxidation of Tungsten under Illumination-Multi-Method Characterization and Modeling at the Molecular Level
dc.typeArticle
oaire.citation.issue21
oaire.citation.volume28
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