Electroanalytical applications of bare and modified diamond electrodes

摘要

Conductive boron-doped diamond thin films have become very attractive for electrochemical applications such as wastewater attractive and electroanalysis. We have demsontrated several electroanalytical applications of diamond for biologically and environmentally important chemical species. Some of the recent examples include the detection of chlorophenols and carbamate pesticides. In case of chlorophenols, anodically oxidized diamond exhibited excellent sensitivity and stability in contrast to the behavior of glassy carbon. Additionally, e have shown the possibility of reactivation of the diamond electrode by applying high anodic potential, without damaging the electrode, surface. We have also developed miniatures diamond microelectrodes, which offer potential analytical applications in electroanalysis. The electrochemical behavior of homoepitaxial diamond films was examined in order to understand the role of crystal surface and grain boundaries. In case of electroinactive species such as carbohydrates, diamond surface was activated by modifying it with electrocatalytic opera metal nanoporous. Similarly, nanoporous diamond electrodes modified withy Pt nonclusters in the pores have exhibited selective activity for smaller alcohol molecules.