Dynamic Electrochemical Impedance Spectroscopy (DEIS) as a Tool for Analyzing Surface Oxidation Processes on Boron-Doped Diamond Electrodes

89 Surface oxidation processes play a key role in understanding electrochemical properties of boron-doped diamond (BDD) electrodes. Thetype ofsurface termination groups, which create thepotential window ofelectrolytic water stability orhydrophobicity,influences such properties. In this study the kinetics of oxidation process under anodic polarization were studied in situ by means of Dynamic Electrochemical Impedance Spectroscopy (DEIS) technique. This novel approach allows for obtaining the impedance data for nonstationary systems. It has been proven that for [B] dopant level of 10k ppm, polarization to 1.5 V vs. Ag|AgCl is sufficient to initiate transformation of the film terminating BDD electrodes. XPS analysis and wettability measurements confirmed oxidation under given conditions. 10 11 12 13 14 15 16

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