Chemistry Reference
In-Depth Information
desired reduction current can be observed even
without removal of dissolved oxygen.
Physical and Chemical Stability and
Excellent Durability
[100,104]
:
BDD
electrodes are basically degradation-free and
can be used even in a corrosive solution.
Electrolysis can be conducted at high current
density (10 A cm
−2
) and can also be carried out
at temperatures up to 600°C. The electrode
surface is stable and hardly contaminated by
adsorption of impurities.
Fast Electron-Transfer Rate between
Redox Species and BDD Electrode
[101,104,105]
:
Outer-sphere one-electron redox
systems like Fe(CN)
6
4−
/
3−
, IrCl
6
2−
/
3−
and
Ru(NH
3
)
6
2+
/
3+
show reversible waves in cyclic
voltammograms and their electron transfer at
the electrode interface is fast.
Unique Electrochemical Selectivity
[106]
:
Oxygen-terminated BDD electrodes prepared
by treatment with oxygen plasma or anodic
oxidation show selective responses to specific
chemical species.
Since BDD electrodes have a wide potential
window and extremely small background
current in addition to the above features, highly
sensitive sensors for detection of biological
materials have been developed using BDD
electrodes. For example, when an
oxygen-terminated BDD electrode is used, a
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