The peak potential of nicotine in this study was consistent with the value of metal-free carbon nanotube cluster-modified electrodes observed by Highton et al. [7].
A proper operational stability of the modified electrode was observed during its continuous testing for 45 min in ethanol solution with a minor reduction in current response.
The lowest experimental detection limits of 500 nM for nitrobenzene derivatives and 1 μM for nitrite ions at the SiO2/Ag NPs modified electrode were observed.
In the case of phenyldinitromethane differences in the electrocatalytic selectivity of these modified electrodes were also observed.
The structure and morphology changes that occurred during the formation of the modified electrode film were observed by transmission electron microscopy (TEM).
A good cycling stability was observed for the modified electrodes in alkaline media.
Better catalytic activities were observed for the modified electrodes when they were transformed to O Ni O oxo bridge form.
In electrocatalysis, a positive shift in the reduction peak potential for nitrobenzene and a significant increase in the catalytic oxidation current for nitrite ions were observed at these modified electrodes.
CV at Au(bulk) electrodes in pH 5.0 acetate buffer solution, containing Mb, presented the same oxidation peak as observed at {HA/Mb}n modified electrodes, confirming the presence of the same electroactive species.
(22) Two mechanisms can explain the enhanced current observed at NH2-PD-SWCNT modified electrodes.
The observed higher performance of the TiO2 modified electrodes was attributed to the enhanced Pt-Ru dispersion as well as the formation of smaller Pt and Ru particles.
