Frequency regime electrochemical study of silver diffusion in an Ag2S-Ag2S(+Al2O3) bisectional sample

Shengping Ding, William Petuskey

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Electrochemical cells were used to generate and detect a sinusoidally oscillating wave of the chemical potential of silver propagating through a bisectional sample of pure Ag2S and composite Ag2S(+Al2O3). The chemical diffusion coefficients of Ag in the pure and composite sections were determined, as was the ratio of their thermodynamic factors, by fitting in the frequency regime mathematical relations to the experimentally determined amplitude attenuation and phase shift of the wave. These relations were derived by solving Fick's second law of diffusion under appropriate conditions. The presence of Al2O3 particles in the composite material altered its diffusional properties significantly, which was attributed to an adsorption-desorption of Ag ions at the Ag2S-Al2O3 interfaces. The results were correlated with previously reported work.

Original languageEnglish (US)
Pages (from-to)2306-2316
Number of pages11
JournalJournal of the Electrochemical Society
Volume142
Issue number7
StatePublished - Jul 1995

Fingerprint

Silver
silver
composite materials
Composite materials
Electrochemical cells
electrochemical cells
Chemical potential
Phase shift
Desorption
phase shift
diffusion coefficient
attenuation
desorption
Thermodynamics
Ions
Adsorption
thermodynamics
adsorption
shift
ions

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Frequency regime electrochemical study of silver diffusion in an Ag2S-Ag2S(+Al2O3) bisectional sample. / Ding, Shengping; Petuskey, William.

In: Journal of the Electrochemical Society, Vol. 142, No. 7, 07.1995, p. 2306-2316.

Research output: Contribution to journalArticle

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