Voltammetric and amperometric study of electrochemical activity of boron-doped polycrystalline diamond thin film electrodes

The electrochemical activity of boron-doped polycrystalline diamond thin film (BDF) electrodes was studied by using voltammetry to determine hexacyanoferrate(III/II) in KCl and HCl-KCl (pH = 1.3) solutions. The preliminary results were compared with those given by glassy carbon (GC) electrodes and proved that the BDF electrodes offered high sensitivity, good precision and extreme stability over a month period. The effects of pH and their ohmic resistance on response current of BDF electrodes were also studied.