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Pd-Al Alloys Formation by Aluminium Underpotential Deposition on Palladium from Equimolar AlCl3+NaCl Melt

The possibility of electrochemical underpotential deposition of aluminium onto palladium from equimolar AlCl3+NaCl melts at temperatures between 200 ° and 300 °C was investigated. Electrochemical techniques used were cyclic voltammetry, chronoamperometry, potentiodynamic polarization and open circui...

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Bibliographic Details
Published in:International journal of electrochemical science 2021-06, Vol.16 (6), p.210663, Article 210663
Main Authors: Vukićević, Nataša M., Cvetković, Vesna S., Jovićević, Niko, Jovićević, Jovan N.
Format: Article
Language:English
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Summary:The possibility of electrochemical underpotential deposition of aluminium onto palladium from equimolar AlCl3+NaCl melts at temperatures between 200 ° and 300 °C was investigated. Electrochemical techniques used were cyclic voltammetry, chronoamperometry, potentiodynamic polarization and open circuit measurements. The results were analyzed by SEM, EDX and XRD. It was found that аluminium deposits underpotentially onto palladium at around 0.200 V vs. Al from the chloroaluminate melt used. It was established that under the given conditions, Al underpotential deposition onto the palladium substrate can result in AlPd and Al3Pd4 alloy synthesis by solid-state interdiffusion. The surface alloys synthetized are well adhering, microcrystalline deposits, having highly developed surface area suitable for applications such as hydrogen purification filters.
ISSN:1452-3981
1452-3981
DOI:10.20964/2021.06.62