Local electrochemical impedance spectroscopy in dynamic mode of galvanic coupling

Łukasz Burczyk; Kazimierz Darowicki

doi:10.1016/j.electacta.2018.05.192

Local electrochemical impedance spectroscopy in dynamic mode of galvanic coupling

Abstract

A novel method that combines local electrochemical impedance spectroscopy and mapping in dynamicmode is proposed. Method was validated over two galvanic couplings, namely zinc/copper and cad-mium/copper. Impedance spectrum response for all measuring points was obtained by means ofsimultaneous implementation of selected range of frequencies. Proposed method allows the measure-ment in a more time-efﬁcient manner, at the same time providing extensive impedance characteristic.Moreover, the aspect of probe-to-sample distance was introduced. Furthermore, the inversion of theprobe-to-sample distance experiment direction allows for determination of approaching procedure forlocal impedance measurements (with support of theoretical calculations). Proposed method wascompared with standard LEIS measurement on system which undergoes rapid changes, giving resultsthat were not obtainable with standard method. This indicates that by applying dynamic measurements,it is possible to introduce additional variable into the investigated system, what should contribute tobroader application of local impedance measurements.

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Articles

Type:

artykuł w czasopiśmie wyróżnionym w JCR

Published in:

ELECTROCHIMICA ACTA no. 282, pages 304 - 310,
ISSN: 0013-4686

Language:

English

Publication year:

2018

Bibliographic description:

Burczyk Ł., Darowicki K.: Local electrochemical impedance spectroscopy in dynamic mode of galvanic coupling// ELECTROCHIMICA ACTA. -Vol. 282, (2018), s.304-310

DOI: