Tipo
Artigos em Revista
Tipo de Documento
Artigo Completo
Título
Application of the combined electrochemical quartz crystal microbalance and probe beam deflection technique in deep eutectic solvents
Participantes na publicação
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)
Resumo
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.
Data de Submissão/Pedido
2013-12-21
Data de Aceitação
2014-04-12
Data de Publicação
2014-05-02
Instituição
Centro de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa
Suporte
Electrochimica Acta
Identificadores da Publicação
ISSN - 0013-4686
Editora
Elsevier BV
Número de Páginas
9
Página Inicial
42
Página Final
51
Identificadores do Documento
URL -
http://dx.doi.org/10.1016/j.electacta.2014.04.062
DOI -
https://doi.org/10.1016/j.electacta.2014.04.062
Identificadores de Qualidade
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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