Research Article

Fabrication of Hybrid Diamond and Transparent Conducting Metal Oxide Electrode for Spectroelectrochemistry

Figure 5

(a) Background corrected cyclic voltammograms of diamond hybrid OTE in Ru(NH3)63+ of different concentrations in 0.1 M acetate buffer: (i) 1000 μM, (ii) 500 μM, and (iii) 250 μM, with scan rate of 50 mV/s. (b) The cyclic voltammogram of diamond hybrid OTE in 1 mM Ru(NH3)63+ in 0.1 M acetate buffer, scan rate 50 mV/s, showing a wide potential window from −1.35 to 1.5 V. (c) The peak-to-peak separation in voltammograms with differing Ru(NH3)63+ concentrations for diamond hybrid OTE, with scan rate 50 mV/s. The ideal Nernstian system exhibits a peak separation of 59.2 mV which is marked as a crossing in the Y-axis. (d) UV-Vis spectroscopy of 1 mM 4-aminophenol in 0.1 M acetate buffer of pH 4.6 with a BDD OTE at differing applied potentials: (i) 0.1 V, (ii) 0.12 V, (iii) 0.14 V, (iv) 0.16 V, and (v) 0.18 V.
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(a)
286458.fig.005b
(b)
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(c)
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(d)