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Title: Copper underpotential deposition at gold surfaces in contact with a deep eutectic solvent: new insights
Author: Sebastián, Paula
Gómez, Elvira
Climent Paya, Victor Jose
Feliu, Juan M.
Keywords: Solucions iòniques
Ionic solutions
Issue Date: 31-Mar-2017
Publisher: Elsevier B.V.
Abstract: Copper electrodeposition on polycrystalline gold electrode and on Au(hkl) single crystals was investigated in a deep eutectic solvent (DES). The employed DES consisted on a mix of choline chloride and urea (1:2). The interface Au(hkl) /DES was studied by using cycling voltammetry in the capacitive region. The blank voltammograms showed characteristic features, not previously reported, that demonstrates the surface sensitivity of this solvent. Afterwards, copper electrodeposition was analyzed, finding that it takes place through the formation of a UPD adlayer, evidencing the surface sensitivity of the phenomena. Voltammetric profiles showed similarities with those obtained in aqueous solutions containing chloride, suggesting that the copper UPD in this DES is strongly influenced by the presence of chloride.
Note: Versió postprint del document publicat a:
It is part of: Electrochemistry Communications, 2017, vol. 78, p. 51-55
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ISSN: 1388-2481
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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