Basic Electrochemical Properties of Microcrystalline and Nanocrystalline Diamond Thin Film Electrodes

BASIC ELECTROCHEMICAL PROPERTIES OF MICROCRYSTALLINE AND NANOCRYSTALLINE DIAMOND THIN FILM ELECTRODES 

The double-layer capacitance for glassy carbon in the potential region from —500 to 1000 mV varies from 30 to 40 pF/cm (geometric area), while that for diamond ranges from 3 to 7 pF/cm [22,28,33,38]. The voltammogram for glassy carbon, shown in Fig. 9, shows some evidence for characteristic oxidation and reduction peaks centered at 350 mV 

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Background cyclic voltammetric i-E curves for (a) glassy carbon, (b) a moderately boron-doped microcrystalline diamond film electrode, and (c) a heavily boron-doped microcrystalline diamond film electrode in 0.1 M HCIO4. Electrode area = 0.2 cm. Scan rate = 0.1 V/s. 

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