Preparation and characterization of Ti/Diamond electrodes

Boron doped diamond films have been deposited on Ti substrates by CVD. Raman spectroscopy reveals the presence of small amounts of nondiamond carbon. According to SEM and XRD, the diamond films are polycrystalline with preferential 〈112〉 crystallite orientation. Electrochemical measurements show that the Fe(CN)3−/4−6 couple behaves in a quasi-reversible manner at the Ti/Diamond electrode. The main reason of the successful preparation of the Ti/Diamond electrode is the formation of an conductive TiC interlayer between the Ti substrate and the diamond coating.