Hydronium-dominated ion transport in carbon-dioxide-saturated electrolytes at low salt concentrations in nanochannels

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Hydronium-dominated ion transport in carbon-dioxide-saturated electrolytes at low salt concentrations in nanochannels. / Lund Jensen, Kristian; Kristensen, Jesper Toft; Crumrine, Andrew Michael; Andersen, Mathias Bækbo; Bruus, Henrik; Pennathur, Sumita.

In: Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), Vol. 83, No. 5, 2011, p. artikle number 056307.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Lund Jensen, Kristian; Kristensen, Jesper Toft; Crumrine, Andrew Michael; Andersen, Mathias Bækbo; Bruus, Henrik; Pennathur, Sumita / Hydronium-dominated ion transport in carbon-dioxide-saturated electrolytes at low salt concentrations in nanochannels.

In: Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), Vol. 83, No. 5, 2011, p. artikle number 056307.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Bibtex

@article{384ab957e2ca423d905d0f6f597ad69a,
title = "Hydronium-dominated ion transport in carbon-dioxide-saturated electrolytes at low salt concentrations in nanochannels",
publisher = "American Physical Society",
author = "{Lund Jensen}, Kristian and Kristensen, {Jesper Toft} and Crumrine, {Andrew Michael} and Andersen, {Mathias Bækbo} and Henrik Bruus and Sumita Pennathur",
note = "©2011 American Physical Society. This article may be downloaded for personal use only.",
year = "2011",
doi = "10.1103/PhysRevE.83.056307",
volume = "83",
number = "5",
pages = "artikle number 056307",
journal = "Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)",
issn = "1539-3755",

}

RIS

TY - JOUR

T1 - Hydronium-dominated ion transport in carbon-dioxide-saturated electrolytes at low salt concentrations in nanochannels

A1 - Lund Jensen,Kristian

A1 - Kristensen,Jesper Toft

A1 - Crumrine,Andrew Michael

A1 - Andersen,Mathias Bækbo

A1 - Bruus,Henrik

A1 - Pennathur,Sumita

AU - Lund Jensen,Kristian

AU - Kristensen,Jesper Toft

AU - Crumrine,Andrew Michael

AU - Andersen,Mathias Bækbo

AU - Bruus,Henrik

AU - Pennathur,Sumita

PB - American Physical Society

PY - 2011

Y1 - 2011

N2 - Nanochannel ion transport is known to be governed by surface charge at low ionic concentrations. In this paper, we show that this surface charge is typically dominated by hydronium ions arising from dissolution of ambient atmospheric carbon dioxide. Taking the hydronium ions into account, we model the nanochannel conductance at low salt concentrations and identify a conductance minimum before saturation at a value independent of salt concentration in the dilute limit. Via the Poisson-Boltzmann equation, our model self-consistently couples chemical-equilibrium dissociation models of the silica wall and of the electrolyte bulk, parametrized by the dissociation reaction constants. Experimental data with aqueous KCl solutions in 165-nm-high silica nanochannels are described well by our model, both with and without extra hydronium from added HCl.

AB - Nanochannel ion transport is known to be governed by surface charge at low ionic concentrations. In this paper, we show that this surface charge is typically dominated by hydronium ions arising from dissolution of ambient atmospheric carbon dioxide. Taking the hydronium ions into account, we model the nanochannel conductance at low salt concentrations and identify a conductance minimum before saturation at a value independent of salt concentration in the dilute limit. Via the Poisson-Boltzmann equation, our model self-consistently couples chemical-equilibrium dissociation models of the silica wall and of the electrolyte bulk, parametrized by the dissociation reaction constants. Experimental data with aqueous KCl solutions in 165-nm-high silica nanochannels are described well by our model, both with and without extra hydronium from added HCl.

U2 - 10.1103/PhysRevE.83.056307

DO - 10.1103/PhysRevE.83.056307

JO - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)

JF - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)

SN - 1539-3755

IS - 5

VL - 83

SP - artikle number 056307

ER -