Abstract
AbstractThe electrocatalytic oxidation of glucose on gold nanocomposite electrodes was investigated with cyclic voltammetry. The gold nanocomposite electrodes were prepared by precipitating gold nanoparticles of different sizes from the corresponding colloidal solutions onto planar substrates, and the electrodes exhibited higher catalytic activity for the oxidation of glucose in alkaline solution with a negative shift in oxidation potential and a larger current as compared with bare gold electrodes. The high catalytic activity of the gold nanocomposite electrodes also resulted in easy oxidation of gluconolactone produced in the reaction. The modification of the gold nanocomposite electrodes with silver underpotential deposition led to a further negative shift in potential but a drop in current for the glucose oxidation.
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