The influence of potential on electrodeposition of silver and formation of silver nanoparticles in some ionic liquids

Ryuta Fukui, Yasushi Katayama, Takashi Miura

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Electrodeposition of Ag was studied in several ionic liquids. When the potential applied more negative than -0.25 V vs. Ag Ag(I), the cathodic current density reached in the diffusion-controlled region. The surface morphology of Ag deposits, the initial stage of nucleation and crystal growth behavior and the apparent current efficiency changed depending on the applied potential. These results indicate that the applied potential affects the electrodeposition processes of Ag under diffusion-controlled region. Since the electrode reaction rate is controlled by diffusion, the change of the surface morphology may be caused by the change of the double layer structure, which is expected to depend on the applied potential. In addition, Ag nanoparticles were obtained in the ionic liquid after potentiostatic cathodic reduction, suggesting a part of reduced Ag was dispersed in the ionic liquid.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume158
Issue number9
DOIs
Publication statusPublished - 2011

Fingerprint

Ionic Liquids
Silver
Ionic liquids
Electrodeposition
electrodeposition
silver
Nanoparticles
nanoparticles
Surface morphology
liquids
Crystallization
Crystal growth
Reaction rates
Nucleation
Current density
Deposits
crystal growth
Electrodes
reaction kinetics
deposits

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

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AU - Fukui, Ryuta

AU - Katayama, Yasushi

AU - Miura, Takashi

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AB - Electrodeposition of Ag was studied in several ionic liquids. When the potential applied more negative than -0.25 V vs. Ag Ag(I), the cathodic current density reached in the diffusion-controlled region. The surface morphology of Ag deposits, the initial stage of nucleation and crystal growth behavior and the apparent current efficiency changed depending on the applied potential. These results indicate that the applied potential affects the electrodeposition processes of Ag under diffusion-controlled region. Since the electrode reaction rate is controlled by diffusion, the change of the surface morphology may be caused by the change of the double layer structure, which is expected to depend on the applied potential. In addition, Ag nanoparticles were obtained in the ionic liquid after potentiostatic cathodic reduction, suggesting a part of reduced Ag was dispersed in the ionic liquid.

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