Electrochemical behavior of new electrode material: Compact of boron-doped synthetic diamond

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• 作者：Yu. V. Pleskov ; M. D. Krotova ; V. V. Elkin…
• 关键词：diamond ; compact ; boron carbide ; polycrystalline ; cyclic voltammetry ; electrochemical impedance spectroscopy
• 刊名：Russian Journal of Electrochemistry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：52
• 期：1
• 页码：1-6
• 全文大小：676 KB
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• 作者单位：Yu. V. Pleskov (1)
  M. D. Krotova (1)
  V. V. Elkin (1)
  E. A. Ekimov (2)
  
  1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071, Russia
  2. Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow, 142190, Russia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3342

文摘

Electrochemical properties of new electrode material—compact of boron-doped synthetic diamond—is studied for the first time. Cylindrical samples 3.5–4 mm in diameter and 2.5 mm in height were obtained by thermobaric processing of graphite–boron carbide mixtures in the diamond thermodynamic stability region (at the pressure of 8–9 GPa and temperature of ~2500 K). Their electrode behavior is studied using cyclic voltammetry and electrochemical impedance spectroscopy techniques. The cyclic voltammograms of the compact samples showed that their electrode characteristics are similar to those of traditional thin-film diamond electrodes obtained by the chemical vapor deposition (CVD) technique. In particular, they demonstrate rather wide potential window, low background current in indifferent electrolytes, and good reproducibility. It can be concluded that the diamond compacts practically are not inferior to the thin-film CVD-diamond electrodes and can serve as indicator electrodes, e.g., in electroanalysis. At the same time their compact form may be a convenience in the designing of electrolyzers and other electrochemical devices. Keywords diamond compact boron carbide polycrystalline cyclic voltammetry electrochemical impedance spectroscopy