Interplay between the hydrophilicity of metal electrodes and their interfacial capacitance

Anton Ruzanov; Karl Karu; Vladislav Ivaništšev; Renat R. Nazmutdinov; Enn Lust

doi:10.1016/j.electacta.2016.05.110

Interplay between the hydrophilicity of metal electrodes and their interfacial capacitance

Anton Ruzanov
, Karl Karu
, Vladislav Ivaništšev^*
, Renat R. Nazmutdinov
, Enn Lust

^*Corresponding author for this work

University of Tartu
Kazan National Research Technological University

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The capacitive behaviour of interfaces between aqueous solutions of non-specifically adsorbing electrolytes and Hg, Bi(111) and Ga electrodes has been studied on the basis of a quantum chemical approach and using a simple lattice model in the mean field approximation. Dependencies of the compact layer differential capacitance (C_H) on the electrode surface charge density (σ) have been constructed and compared with the experimental data. A significant difference in the C_H(σ) dependence observed in the experiment with different metal electrodes has been explained in terms of the interplay between contributions from metal electrons and adsorbed solvent molecules. New data elucidating the metal-water adsorption bond have been reported as well.

Original language	English
Pages (from-to)	615-621
Number of pages	7
Journal	Electrochimica Acta
Volume	210
DOIs	https://doi.org/10.1016/j.electacta.2016.05.110
Publication status	Published - 20 Aug 2016
Externally published	Yes

Keywords

bismuth
density functional theory
electrical double layer capacitance
gallium
mercury

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10.1016/j.electacta.2016.05.110

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title = "Interplay between the hydrophilicity of metal electrodes and their interfacial capacitance",

abstract = "The capacitive behaviour of interfaces between aqueous solutions of non-specifically adsorbing electrolytes and Hg, Bi(111) and Ga electrodes has been studied on the basis of a quantum chemical approach and using a simple lattice model in the mean field approximation. Dependencies of the compact layer differential capacitance (CH) on the electrode surface charge density (σ) have been constructed and compared with the experimental data. A significant difference in the CH(σ) dependence observed in the experiment with different metal electrodes has been explained in terms of the interplay between contributions from metal electrons and adsorbed solvent molecules. New data elucidating the metal-water adsorption bond have been reported as well.",

keywords = "bismuth, density functional theory, electrical double layer capacitance, gallium, mercury",

author = "Anton Ruzanov and Karl Karu and Vladislav Ivani{\v s}t{\v s}ev and Nazmutdinov, \{Renat R.\} and Enn Lust",

year = "2016",

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doi = "10.1016/j.electacta.2016.05.110",

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T1 - Interplay between the hydrophilicity of metal electrodes and their interfacial capacitance

AU - Ruzanov, Anton

AU - Karu, Karl

AU - Ivaništšev, Vladislav

AU - Nazmutdinov, Renat R.

AU - Lust, Enn

PY - 2016/8/20

Y1 - 2016/8/20

N2 - The capacitive behaviour of interfaces between aqueous solutions of non-specifically adsorbing electrolytes and Hg, Bi(111) and Ga electrodes has been studied on the basis of a quantum chemical approach and using a simple lattice model in the mean field approximation. Dependencies of the compact layer differential capacitance (CH) on the electrode surface charge density (σ) have been constructed and compared with the experimental data. A significant difference in the CH(σ) dependence observed in the experiment with different metal electrodes has been explained in terms of the interplay between contributions from metal electrons and adsorbed solvent molecules. New data elucidating the metal-water adsorption bond have been reported as well.

AB - The capacitive behaviour of interfaces between aqueous solutions of non-specifically adsorbing electrolytes and Hg, Bi(111) and Ga electrodes has been studied on the basis of a quantum chemical approach and using a simple lattice model in the mean field approximation. Dependencies of the compact layer differential capacitance (CH) on the electrode surface charge density (σ) have been constructed and compared with the experimental data. A significant difference in the CH(σ) dependence observed in the experiment with different metal electrodes has been explained in terms of the interplay between contributions from metal electrons and adsorbed solvent molecules. New data elucidating the metal-water adsorption bond have been reported as well.

KW - bismuth

KW - density functional theory

KW - electrical double layer capacitance

KW - gallium

KW - mercury

UR - https://www.scopus.com/pages/publications/84973661567

U2 - 10.1016/j.electacta.2016.05.110

DO - 10.1016/j.electacta.2016.05.110

M3 - Article

AN - SCOPUS:84973661567

SN - 0013-4686

VL - 210

SP - 615

EP - 621

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Interplay between the hydrophilicity of metal electrodes and their interfacial capacitance

Abstract

Keywords

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