Electrolytic behavior silver microphases and nanophases on the graphite electrode surface

D. O. Perevezentseva, E. V. Gorchakov, Yu A. Oskina

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

The stepwise mechanism of electrooxidation and reduction of silver nanophases and microphases is proposed on the graphite electrodes surface in alkaline medium. The electrochemical splitting of silver nanophases peak is observed on the anodic branch of the cyclic current-voltage curve. There is the shoulder at E = 0.2 V on the he anodic branch of cyclic current-voltage curve. The appearance of additional cathodic wave at E = -0.08 V is observed on the cathodic branch of the cyclic current-voltage curve that is caused by the reduction of silver nanoparticles. The additional cathode maximum is represented at 0.3 V on the cathodic branch of the cylic current-voltage curves of only silver nanophases. This effect is associated the catalytic process of decomposition of hydrogen peroxide on silver nanoparticles surface. The offset of the cathodic maxima of current-voltage curves of silver nanophases obtained with an excess of a reducing agent are observed to more negative potentials. There is a significant decrease of the all currents maxima compared to silver nanophases obtained with an equal molar ratio of reactants. These results may be connected with the formation of silver oxide monolayers in the different oxidation in the presence of large amounts a reducing agent. The excess of the reducing agent required for the preparation of silver nanoparticles leads to decrease of the cathodic maximum of silver nanoparticles.

Original languageEnglish
Title of host publicationAdvanced Materials for Technical and Medical Purpose
PublisherTrans Tech Publications Ltd
Pages117-122
Number of pages6
Volume712
ISBN (Print)9783035710649
DOIs
Publication statusPublished - 2016
EventWorkshop on Advanced Materials for Technical and Medical Purpose, AMTMP-2016 - Tomsk, Russian Federation
Duration: 15 Feb 201617 Feb 2016

Publication series

NameKey Engineering Materials
Volume712
ISSN (Print)1013-9826

Conference

ConferenceWorkshop on Advanced Materials for Technical and Medical Purpose, AMTMP-2016
CountryRussian Federation
CityTomsk
Period15.2.1617.2.16

Keywords

  • Cyclic voltammetry
  • Graphite electrode
  • Silver nanoparticles

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Perevezentseva, D. O., Gorchakov, E. V., & Oskina, Y. A. (2016). Electrolytic behavior silver microphases and nanophases on the graphite electrode surface. In Advanced Materials for Technical and Medical Purpose (Vol. 712, pp. 117-122). (Key Engineering Materials; Vol. 712). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.712.117