Contact Galvani potential differences at liquid∣liquid interfaces

Jensen, Henrik; Devaud, Valérie; Josserand, Jacques

doi:10.1016/s0022-0728(02)01250-0

Cited by 24 publications

(8 citation statements)

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“…23 junction potential at the interface between two-immiscible electrolyte solutions. 16,17 To estimate the magnitude of the diffusion potential at different concentrations of KCl in W, we first measured the molar conductivity of C8mimCl and LiC1C1N (ΛC 8mimCl and ΛLiC 1C1N ) in aqueous solutions at 25˚C for several different concentrations (Table 1), and evaluated the molar conductivities at 1.6 mmol dm -3 , corresponding to the solubility of [C8mim + ][C1C1N -]. 2 We then estimated the molar ionic conductivities of Cl -and Li + ions at this concentration from the conductivities of LiCl, 111.7 S cm 2 mol -1 at 1.6 mmol dm -3 , obtained by interpolation from the values given in Table 1.…”

Section: Contribution Of Diffusion Potentialmentioning

confidence: 99%

Ionic Liquid Salt Bridge in Dilute Aqueous Solutions

Yoshimatsu

Kakiuchi

2007

ANAL. SCI.

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A new type of salt bridge composed of a hydrophobic room-temperature ionic liquid, recently proposed (T. T. Yoshimatsu, Bull. Chem. Soc. Jpn., 2006, 79, 1017), has been shown to be satisfactorily usable in dilute aqueous solutions of submillimolar range. A stable phase-boundary potential has been demonstrated between an ionic liquid, 1-octyl-3-methylimidazolium bis (trifluoromethylsulfonyl) ] and water is maintained constant over more than four orders of magnitude change in the concentration of an aqueous electrolyte solution. The ionic-liquid salt bridge is a superior alternative to salt bridges based on equitransferent electrolytes in practical applications, particularly, the potentiometry of samples of low ionic strengths, such as potentiometric pH measurements of rainwater.

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Section: Contribution Of Diffusion Potentialmentioning

confidence: 99%

Ionic Liquid Salt Bridge in Dilute Aqueous Solutions

Yoshimatsu

Kakiuchi

2007

ANAL. SCI.

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“…(12)) via the migration term as the two ions have different thermal mobilities. This gives rise to the so-called thermal diffusion potential [1] by analogy to the diffusion potential [7,26,28]. In Eq.…”

Section: Equationsmentioning

confidence: 99%

Hydrovoltaic cells. Part II: Thermogalvanic cells and numerical simulations of thermal diffusion potentials

Josserand

Devaud

Lagger

et al. 2004

Journal of Electroanalytical Chemistry

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When two electrolyte solutions of different temperature are placed in contact, a thermal diffusion potential (TDP) is established. The phenomenon is studied numerically using finite element simulations of the temperature distribution within a hydrodynamic cell. Experimentally, the hydrovoltaic flow cell is used to demonstrate how a temperature difference can induce redox reactions at electrodes placed in the two liquids in order to extract a current continuously in an external circuit resulting in a power-generating unit. When the concentration of the redox couple introduced in the solution is moderated, it is shown that the TDP is not negligible, even if the main driving force is due to the temperature effect on the standard potential of the couple present. The numerical model may also be applied in more general situations involving thermal effects in microsystems.

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“…The standard transfer potential for CTA + was estimated, D a NB / 0 CTA þ ¼ À0:370 V, by using a simple formula [54] for the partition coefficient between the aqueous and nitrobenzene phase, K a;NB p ¼ 1:62 [55]:…”

Section: Dmentioning

confidence: 99%