The specific adsorption of halides on mercury in non-aqueous acetonitrile

Schirmer, Heike; Baumgärtel, H.

doi:10.1016/0022-0728(91)87049-a

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…There is a large number of studies examining the adsorption of halides from non-aqueous solvents on mercury electrodes [41][42][43][44] and other liquid electrodes. [45][46][47][48][49] The strong chemical interaction with DMSO molecules in the Helmholtzlayer has been observed on Ga and (InÀ Ga) electrodes.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Iodide and Bromide on Au(111) Electrodes from Aprotic Electrolytes: Role of the Solvent

2020

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The adsorption of iodide and bromide ions on Au(111) singlecrystal electrodes in three organic solvents [propylene carbonate (PC), diglyme (DG), and dimethyl sulfoxide (DMSO)] was studied by differential capacity measurements, cyclic voltammetry (CV), X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). The anion adsorption charge in DMSO is approximately half as large as in propylene carbonate and that in water. Quantification of the adsorbed iodide amount from XPS spectra confirms the coverage estimated from the adsorption charge in CVs. As expected, the rate of anion adsorption on Au(111) is higher for I À than for Br À due to better solvation of the latter. The extent of anion adsorption on Au(111) electrode decreases and the corresponding adsorption rate decreases in the solvent order H 2 O > PC > DG > DMSO. Since the donor number (DN) of the solvent increases in the same order (PC < DG < DMSO), we assume that it plays a decisive role since it determines the chemical interaction of the solvent with the metal surface. Moreover, the adsorption rate of iodide and the extent of its adsorption is increased with increasing water content in PC and DMSO. This effect, and the much higher adsorption rate in water is explained by the closer approach of the solvated halogen ion to the surface and the resulting stronger interaction of the transition state with the electrode.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Iodide and Bromide on Au(111) Electrodes from Aprotic Electrolytes: Role of the Solvent

2020

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“…In spite of these important implications, halide specific adsorption has hitherto been exhaustively elucidated by authoritative schools only in the aqueous medium on single crystal electrodes [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21], while data in organic solvents [22,23] are still very few.…”

Section: Introductionmentioning

confidence: 99%

Specific adsorption of bromide and iodide anions from nonaqueous solutions on controlled-surface polycrystalline silver electrodes

Falciola

Mussini

Trasatti

et al. 2006

Journal of Electroanalytical Chemistry

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On the Stability and on the Formation of Two‐dimensional Condensed Equilibrium Films in an Aprotic and in Aqueous Solution — Part I: The Thermodynamics of Condensed 2‐Thiohydantoin at the Mercury Interface in Nonaqueous Acetonitrile, Tetraethylammoniumperchlorate

Schrettenbrunner

Chaiyasith

Baumgärtel

et al. 1993

Ber Bunsenges Phys Chem

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The behaviour of 2‐thiohydantoin at the interface mercury/nonaqueous acetonitrile, tetraethylammoniumperchlorate has been investigated by measuring the double layer capacitance in the potential range between 1.1 V≤‐E≤0.5 V. It is shown that a condensed adsorbate is established in a specific interval of potential, temperature and concentration of 2‐thiohydantoin. From the experimental data the molecular surface area in the condensed state and the sum of adsorption and intermolecular interaction energy of condensed molecules has been evaluated. The values are comparable to those of aqueous systems.

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The specific adsorption of halides on mercury in non-aqueous acetonitrile

Cited by 7 publications

References 44 publications

Adsorption of Iodide and Bromide on Au(111) Electrodes from Aprotic Electrolytes: Role of the Solvent

Adsorption of Iodide and Bromide on Au(111) Electrodes from Aprotic Electrolytes: Role of the Solvent

Specific adsorption of bromide and iodide anions from nonaqueous solutions on controlled-surface polycrystalline silver electrodes

On the Stability and on the Formation of Two‐dimensional Condensed Equilibrium Films in an Aprotic and in Aqueous Solution — Part I: The Thermodynamics of Condensed 2‐Thiohydantoin at the Mercury Interface in Nonaqueous Acetonitrile, Tetraethylammoniumperchlorate

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