Electrochemical Behaviour of Boron-doped Diamond Compacts - a New Electrode Materialстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 декабря 2017 г.
Аннотация:Electrochemical properties of new electrode material, synthetic diamond compacts with the boron
(dopant) level approaching the upper limit, are studied for the
first time. Cylinder-shaped polycrystalline
samples, 3.5–4 mm in diameter and 2.5 mm in height, were prepared 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 diamond nature, in particular, the absence of graphite, was
confirmed by Raman spectroscopy and XRD technique. The compacts’ electrode behavior is studied by
using cyclic voltammetry and electrochemical impedance spectroscopy. The cyclic voltammograms
showed that the compacts are very much similar to conventional chemical-vapor-deposited thin-film
diamond electrodes in their electrode characteristics. In particular, they have wide potential window, low
background current in indifferent electrolytes (KCl, K2SO4) and good reproducibility. Moreover, their
extremely high doping level makes them somewhat more electroactive. Anodic oxidation of benzene is
accompanied by electrode-surface blocking phenomena. To conclude, the compacts are well comparable
to the CVD-diamond electrodes. One might think that they can equally be used, e.g., as electrodes in
electrosynthesis, electroanalysis, water treatment, etc. Moreover, they could be more robust in
electrochemical devices (sensors, etc.).