Dispersion of silver particles in aqueous solutions visualized by polarography/voltammetry

Andrey Korshunov, Michael Heyrovský

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The State of silver particles in aqueous dispersions and the course of their coagulation can be followed on voltammetric curves recorded with hanging mercury drop electrode. Sharp irregular cathodic current peaks produced by partial electroreduction of the species adsorbed on the surface of silver particles during their fortuitous impingements upon the electrode surface appear in time sequence on the curves. A change in the electrochemical behavior of silver sols in the time course of particles aggregation and growth was interpreted in agreement with the data of UV-vis spectroscopy and electron microscopy observations.

Original languageEnglish
Pages (from-to)6264-6268
Number of pages5
JournalElectrochimica Acta
Volume54
Issue number26
DOIs
Publication statusPublished - 1 Nov 2009

Fingerprint

Polarographic analysis
Voltammetry
Silver
Electrodes
Polymethyl Methacrylate
Sols
Coagulation
Ultraviolet spectroscopy
Mercury
Dispersions
Electron microscopy
Particles (particulate matter)
Agglomeration

Keywords

  • Dropping mercury electrode
  • Hanging mercury drop electrode
  • Particulate electrode reaction
  • Silver ions
  • Silver particles
  • Time course of silver particles agglomeration

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Dispersion of silver particles in aqueous solutions visualized by polarography/voltammetry. / Korshunov, Andrey; Heyrovský, Michael.

In: Electrochimica Acta, Vol. 54, No. 26, 01.11.2009, p. 6264-6268.

Research output: Contribution to journalArticle

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AB - The State of silver particles in aqueous dispersions and the course of their coagulation can be followed on voltammetric curves recorded with hanging mercury drop electrode. Sharp irregular cathodic current peaks produced by partial electroreduction of the species adsorbed on the surface of silver particles during their fortuitous impingements upon the electrode surface appear in time sequence on the curves. A change in the electrochemical behavior of silver sols in the time course of particles aggregation and growth was interpreted in agreement with the data of UV-vis spectroscopy and electron microscopy observations.

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KW - Time course of silver particles agglomeration

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