Speciation of Copper(II)-Betaine Complexes as Starting Point for Electrochemical Copper Deposition from Ionic Liquids

Richter J, Knies M, Ruck M (2021)

Publication Type: Journal article

Publication year: 2021

Journal

ChemistryOpen Wiley Open Access: Chemistry Open / Wiley

Book Volume: 10

Pages Range: 97-109

Journal Issue: 2

DOI: 10.1002/open.202000231

Abstract

The application of ionic liquids for the dissolution of metal oxides is a promising field for the development of more energy- and resource-efficient metallurgical processes. Using such solutions for the production of valuable chemicals or electrochemical metal deposition requires a detailed understanding of the chemical system and the factors influencing it. In the present work, several compounds are reported that crystallize after the dissolution of copper(II) oxide in the ionic liquid [Hbet][NTf2]. Dependent on the initial amount of chloride, the reaction temperature and the purity of the reagent, copper crystallizes in complexes with varying coordination geometries and ligands. Subsequently, the influence of these different complex species on electrochemical properties is shown. For the first time, copper is deposited from the ionic liquid [Hbet][NTf2], giving promising opportunities for more resource-efficient copper plating. The copper coatings were analyzed by SEM and EDX measurements. Furthermore, a mechanism for the decomposition of [Hbet][NTf2] in the presence of chloride is suggested and supported by experimental evidence.

Involved external institutions

Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Richter, J., Knies, M., & Ruck, M. (2021). Speciation of Copper(II)-Betaine Complexes as Starting Point for Electrochemical Copper Deposition from Ionic Liquids. ChemistryOpen, 10(2), 97-109. https://dx.doi.org/10.1002/open.202000231

MLA:

Richter, Janine, Maximilian Knies, and Michael Ruck. "Speciation of Copper(II)-Betaine Complexes as Starting Point for Electrochemical Copper Deposition from Ionic Liquids." ChemistryOpen 10.2 (2021): 97-109.

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