Document type
Journal articles
Document subtype
Full paper
Title
Application of the combined electrochemical quartz crystal microbalance and probe beam deflection technique in deep eutectic solvents
Participants in the publication
A. Robert Hillman (Author)
Karl S. Ryder (Author)
Christopher J. Zaleski (Author)
Virginia C Ferreira (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
Dep. Química e Bioquímica
Dep. Química e Bioquímica
CQB
Christopher A. Beasley (Author)
Eric Vieil (Author)
Summary
The electrochemical quartz crystal microbalance (EQCM) and probe beam deflection (PBD) have been widely used to study interfacial processes in molecular solvent-based electrolytes. However, there has been limited use of the EQCM and none of PBD in room temperature ionic liquids, including deep eutectic solvents (DES). Here we explore the use of the combined EQCM/PBD technique to the study of Ag and Sn electrodeposition from a DES comprising a 1:2 mixture of choline chloride and ethylene glycol. While overcoming the effect of viscous loss in the acoustic wave (EQCM) part of the experiment is understood, the optical (PBD) technique fails to provide a meaningful response in slow scan rate voltammetric experiments; this contrasts sharply with the straightforward behaviour seen in aqueous media.Solution transport considerations reveal this to be a consequence of long surface-to-beam transit times in the viscous DES. The problem can be overcome by operating at scan rates 1-2 orders of magnitude slower, permitting application of this powerful technique to novel media of technological interest. The PBD responses reveal unanticipated chemical effects: multiple complexes in the Ag system and solubility limitations in the Sn system, neither of which is evident from the electrochemical or QCM responses.
Date of Submisson/Request
2013-12-21
Date of Acceptance
2014-04-12
Date of Publication
2014-05-02
Institution
Centro de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa
Where published
Electrochimica Acta
Publication Identifiers
ISSN - 0013-4686
Publisher
Elsevier BV
Number of pages
9
Starting page
42
Last page
51
Document Identifiers
URL -
http://dx.doi.org/10.1016/j.electacta.2014.04.062
DOI -
https://doi.org/10.1016/j.electacta.2014.04.062
Rankings
SCIMAGO Q1 (2016) - 1.355 - Electrochemistry
SCOPUS Q1 (2013) - 1.435 - Electrochemistry
Web Of Science Q1 (2017) - 5.116 - ELECTROCHEMISTRY - SCIE
Keywords
electrocrystallization
tin
silver
Probe beam deflection
quartz crystal microbalance
deep eutectic solvent
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