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Influence of Chloride and Nitrate Anions on Copper Electrodeposition onto Au(111) from Deep Eutectic Solvents

Geng, Tanja; Schick, Benjamin W.; Uhl, Matthias; Kuehne, Alexander J. C.; Kibler, Ludwig A.; Ceblin, Maximilian U. ; Jacob, Timo 1
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

Copper electrodeposition on Au(111) from deep eutectic solvents (DESs) type III was investigated employing cyclic voltammetry as well as chronoamperometry. It was further examined on Au(poly) using the electrochemical quartz crystal microbalance (EQCM). The employed DESs are mixtures of choline chloride (ChCl) or choline nitrate (ChNO$_{3}$) with ethylene glycol (EG) as hydrogen bond donor (HBD), each in a molar ratio of 1 : 2. CuCl, CuCl$_{2}$, or Cu(NO$_{3}$)$_{2}$ ⋅ 3H$_{2}$O were added as copper sources. Underpotential deposition (UPD) of Cu precedes bulk deposition in chloride as well as nitrate electrolytes. Cu deposition from Cu$^{+}$ in chloride media is observed as a one-electron reaction, whereas deposition from Cu$^{2+}$ occurs in two steps since Cu$^{+}$ is strongly stabilized by chloride. Cu$^{+}$ is less stabilized by nitrate and the beginning of bulk deposition in the nitrate-containing DES with Cu$^{2+}$ is shifted by several hundred mV to more positive potentials compared to the chloride DES. A diffusion-controlled, three-dimensional nucleation and growth mechanism is found by chronoamperometric measurements and analysis based on the model of Scharifker and Mostany.


Verlagsausgabe §
DOI: 10.5445/IR/1000150278
Veröffentlicht am 31.08.2022
Originalveröffentlichung
DOI: 10.1002/celc.202101263
Scopus
Zitationen: 4
Web of Science
Zitationen: 3
Dimensions
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 2196-0216
KITopen-ID: 1000150278
HGF-Programm 38.02.02 (POF IV, LK 01) Components and Cells
Erschienen in ChemElectroChem
Verlag John Wiley and Sons
Band 9
Heft 19
Seiten Art.Nr. e202101263
Vorab online veröffentlicht am 04.08.2022
Nachgewiesen in Web of Science
Dimensions
Scopus
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