NDLI: Investigation of the optimal transient times for chronoamperometric analysis of diffusion coefficients and concentrations in non-aqueous solvents and ionic liquids

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Back cover

Analytical Methods Vol -3

Analytical Methods Vol -2

Analytical Methods Vol -1

Investigation of the optimal transient times for chronoamperometric analysis of diffusion coefficients and concentrations in non-aqueous solvents and ionic liquids

Content Provider	Royal Society of Chemistry (RSC)
Author	Xiong, Linhongjia Henstridge, Martin C. Aldous, Leigh Compton, Richard G.
Copyright Year	2012
Abstract	We report the optimal transient times for chronoamperometric experiments in order to simultaneously determine accurate values of concentration (c) and diffusion coefficient (D), or alternatively the number of electrons passed (n) providing c is known. This is achieved by the analysis of the current-time transients resulting from potential steps for the oxidation of ferrocene in acetonitrile and the reduction of cobaltocenium in 1-ethyl-3-methylimidazolium bis(trifluoromethyl-sulfonyl)imide. The analysis is based upon Shoup and Szabo approximation, which has been reported to describe the current response over all time values to within an error of 0.5% [D. Shoup and A. Szabo, Journal of Electroanalytical Chemistry, 1982, 140, 237-245]. The error is quantified through comparing the resulting chronoamperometric data with simulation at all transient times. In addition, an alternative simple approach to the simultaneous determination of nc and D values is proposed by independently investigating the short and long time regimes of chronoamperometric transients. The chronoamperometry of hydrazine is investigated as a multielectron example process.
Starting Page	371
Ending Page	376
Page Count	6
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	4
Issue Number	2
Journal	Analytical Methods
DOI	10.1039/c1ay05667k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Imide Shoup Acetonitrile Journal of Electroanalytical Chemistry Diffusion Chronoamperometry Hydrazine Szabo Ferrocene
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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