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The Effect of the Iridium Alloying and Hydrogen Sorption on the Physicochemical and Electrochemical Properties of Palladium

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dc.abstract.enThin layers (up to 1 µm) of Pd-Ir alloys were electrodeposited from aqueous, galvanic baths of PdCl2 and IrCl3 mixtures. The morphology of the electrodeposits was examined by means of scanning electron microscopy. The composition of alloys was determined with the use of energy-dispersive spectroscopy, atomic absorption spectrometry, X-ray photoelectron spectroscopy, and Auger electron spectroscopy. For the studies of the electrochemical properties of alloys, cyclic voltammetry, chronoamperometry, and chronopotentiometry were used. It was found that Pd-Ir alloy electrodes were surface-enriched with Pd. Pd-Ir alloys subjected to different electrochemical treatment involving hydrogen sorption changed their surface state. The continuous hydrogen sorption enhanced the Ir ions’ dissolution. The values of thermodynamic functions of hydrogen sorption in strong alkaline electrolytes were comparable with those in acidic electrolytes, whereas the kinetics of the process in alkaline medium was hindered. The miscibility gap in the Pd-Ir-H system vanished for the electrode containing ca. 93.7 at.% Pd.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorCzerwiński, Andrzej
dc.contributor.authorPająk, Małgorzata
dc.contributor.authorHubkowska-Kosińska, Katarzyna
dc.date.accessioned2024-01-26T10:11:42Z
dc.date.available2024-01-26T10:11:42Z
dc.date.copyright2023-06-24
dc.date.issued2023
dc.description.accesstimeAT_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number13
dc.description.versionFINAL_PUBLISHED
dc.description.volume16
dc.identifier.doi10.3390/MA16134556
dc.identifier.issn1996-1944
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122215
dc.identifier.weblinkhttps://www.mdpi.com/1996-1944/16/13/4556/pdf
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofMaterials
dc.relation.pages4556
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.enhydrogen storage
dc.subject.enpalladium-iridium alloy
dc.subject.enelectrodeposition
dc.subject.enhydrogen absorption
dc.subject.enelectrochemical dissolution
dc.subject.enα → β
dc.titleThe Effect of the Iridium Alloying and Hydrogen Sorption on the Physicochemical and Electrochemical Properties of Palladium
dc.typeJournalArticle
dspace.entity.typePublication