Abstract
Cyclic voltammetry and rotating-disk experiments were conducted on hydroquinone, resorcinol, ethanol, methanol and hydrazine for the purpose of comparing the electroactivity of zeolite-modified electrodes with that of a graphite electrode. The modified electrodes were manufactured in the same way as the graphite electrode but with slightly less than 45% of the graphite replaced with zeolites. Zeolite-modified electrodes exhibited an activity substantially larger than that of the graphite electrode in experiments on hydroquinone and resorcinol. Similar activities were observed among the three electrodes in each of the experiments conducted on the other organics. Explanations for the increases in electroactivity are presented in terms of the properties of zeolites and the mechanism for the oxidation of hydroquinone. It is postulated that the increased activities observed at the zeolite-modified electrodes are a consequence of their ability to accept molecules possessing a particular orientation and the ability of the electrically insulated cages of zeolites to stabilize otherwise short-lived intermediates.
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