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The electrochemical activity of surface conductive diamond in aqueous media has been investigated for two redox systems, the reduction of Ru (NH3)63+ to Ru (NH3)62+ and the reduction of Ag+ to Ag. Although electrochemical activity is observed, the responses are not as well defined as at conventional boron-doped electrodes, and in particular, poor long term stability is exhibited. This is attributed to a degradation of the electronic properties of the surface conductive phase as a result of the electrochemical reactions themselves, which tend to disrupt chemically the surface hydrogen layer required for surface conductivity. Electroless deposition of Ag is also observed, as a result of the unusual electronic and chemical properties of surface conducting diamond. (© 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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Compton et al. (2003) studied this question.
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