Electrocatalytic oxidation of glucose at gold nanoparticle-modified carbon electrodes in alkaline and neutral solutions

The electrolytic oxidation of glucose was performed at Au2 nm nanoparticle modified electrodes in both alkaline and neutral solutions. In the alkaline solution, at a potential of −0.3 V, gluconolactone (or gluconate) was formed with a current efficiency of 100%, while at potentials of −0.1 to 0.3 V, oxalate and gluconolactone (or gluconate) were obtained as main products. In a neutral solution, electrolysis at 0.1 and 0.3 V, gluconolactone (or gluconate) was obtained with current efficiencies of 88-100%.