Electrochemical studies of moderately boron doped polycrystalline diamond in non-aqueous solvent

The electrochemistry of boron doped diamond is currently an active field or research. In the majority of studies or diamond electrodes it has been reported that the material acts Lis a semi-metallic electrode. This paper is concerned with studies of moderately doped diamond electrodes in non-aqueous solvent. The results of Mott-Schottky analysis and the cyclic voltammetry of both ferrocene and bis(pentamethylcyclopentadienyl)iron are reported. The influence of surface bond termination, either hydrogen or oxygen. is also considered. It is shown that a response characteristic of a semiconductor can be attained Lit diamond electrodes immersed in acetonitrile provided that the redox couple does not have a similar energy to the graphitic surface states. The results obtained Lire discussed in terms of the Gerischer Marcus model of charge transfer at semiconductor electrodes. (C) 2002 Elsevier Science Ltd. All rights reserved.