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Ion distributions at electrifiedwater-organic interfaces: PB-PMF calculations and impedance spectroscopy measurements
Hou; Binyang; Bu; Wei; Luo GM(罗光明); Luo; Guangming; Vanýsek; Petr; Schlossman; Mark L.
2015
发表期刊JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷号162期号:12页码:H890-H897
文章类型Article
摘要The interface between two immiscible electrolyte solutions consisting of alkali chlorides in water and the organic electrolyte BTPPATPFB in 1,2-dichloroethane is characterized with X-ray reflectivity, interfacial tension and impedance spectroscopy measurements over a range of applied voltage between the bulk solutions. X-ray reflectivity probes the interfacial ion distribution on the sub-nanometer length scale, whereas interfacial tension and impedance spectroscopy characterize quantities such as interfacial excess charge and differential capacitance that represent integrations over the interfacial ion distribution. Predictions of interfacial ion distributions by the recently introduced PB-PMF method, which combines Poisson's equation with ion potentials of mean force, provide excellent agreement, within one to two experimental standard deviations, with both X-ray reflectivity and interfacial tension measurements. However, the agreement with the differential capacitance measured by impedance spectroscopy, and modeled by the Randles equivalent circuit, is not as good. Values of measured and calculated differential capacitance can deviate by as much as 20% for applied electric potential differences larger than approximately +/- 100 mV. These comparisons indicate that our understanding of the ion distributions that underlie these measurements is adequate, but that further understanding of the modeling of impedance spectroscopy data is required for quantitative agreement at larger applied electric potential differences. (C) The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. All rights reserved.
学科领域Electrochemistry; Materials Science
DOI10.1149/2.0621512jes
收录类别SCI ; EI
WOS类目Electrochemistry ; Materials Science, Coatings & Films
WOS记录号WOS:000363600300077
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228907
专题多学科研究中心
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Hou,Binyang,Bu,et al. Ion distributions at electrifiedwater-organic interfaces: PB-PMF calculations and impedance spectroscopy measurements[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2015,162(12):H890-H897.
APA Hou.,Binyang.,Bu.,Wei.,罗光明.,...&Mark L..(2015).Ion distributions at electrifiedwater-organic interfaces: PB-PMF calculations and impedance spectroscopy measurements.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,162(12),H890-H897.
MLA Hou,et al."Ion distributions at electrifiedwater-organic interfaces: PB-PMF calculations and impedance spectroscopy measurements".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 162.12(2015):H890-H897.
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