Electrolytic behavior silver microphases and nanophases on the graphite electrode surface

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

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

7 Цитирования (Scopus)

Аннотация

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.

Язык оригиналаАнглийский
Название основной публикацииAdvanced Materials for Technical and Medical Purpose
ИздательTrans Tech Publications Ltd
Страницы117-122
Число страниц6
Том712
ISBN (печатное издание)9783035710649
DOI
СостояниеОпубликовано - 2016
СобытиеWorkshop on Advanced Materials for Technical and Medical Purpose, AMTMP-2016 - Tomsk, Российская Федерация
Продолжительность: 15 фев 201617 фев 2016

Серия публикаций

НазваниеKey Engineering Materials
Том712
ISSN (печатное издание)1013-9826

Конференция

КонференцияWorkshop on Advanced Materials for Technical and Medical Purpose, AMTMP-2016
СтранаРоссийская Федерация
ГородTomsk
Период15.2.1617.2.16

ASJC Scopus subject areas

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

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  • Цитировать

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