“On line” chromatographic analysis of the products resulting from the electrocatalytic oxidation of d-glucose on pure and adatoms modified Pt and Au electrodes—Part II. Alkaline medium

Electrocatalytic oxidation of monosaccharides on platinum electrodes modified by thallium adatoms in carbonate buffered medium

“…To oxidize carbohydrates, polycrystalline platinum sites are too active and in most cases lead to a dissociative adsorption. This oxidation process, which breaks some carbon-carbon bonds can be avoided by modifying the superficial structure of the Pt electrode using underpotentially deposited metallic adatoms [2,10]. These transition metals have no electrocatalytic effect when, under the same conditions of potential, they are used alone to carry out a selective transformation of sugars such as glucose.…”

“…A number of organic molecules have shown reactivity on platinum electrodes [1][2][3][4][5][6][7][8][9]. To oxidize carbohydrates, polycrystalline platinum sites are too active and in most cases lead to a dissociative adsorption.…”

Enhanced Oxidation of Aldohexose and Aldopentose on Hg Adatom-Modified Au Electrode in Alkaline Aqueous Solution

“…In addition, from the electrochemical behavior of glucose in various pH solutions and the comparison of the electrochemical behavior of glucose with that of the glucose derivatives, it was concluded that the oxidation was catalyzed through the pairing of glucose and its oxidation intermediate with the large amount of OH ad on the Hg adatom-modified Au electrodes. The Hg adatom-modified Au electrode did not exhibit the shift of oxidation wave, but only exhibited high electrocatalytic activity for the glucose oxidation at high overpotential although underpotential sub-monolayers of Tl, Pb, and Bi on Au have exhibited not only an enhancement of oxidation current but also a positive shift of oxidation peak potential for the oxidation of glucose [7]. The enhancement of the oxidation peak current for glucose on the Hg adatom-modified Au electrode was smaller than for the underpotential sub-monolayer of Tl, Pb, and Bi.…”

Performances of Enzymatic Glucose/O2 Biofuel Cells

“…Oxidation of glucose on metallic surfaces has extensively been studied. Among all these investigations, numerous ones have been devoted to the understanding of catalytic effect of platinum on glucose oxidation process (Kokoh et al, 1992a;Kokoh et al, 1992b;Sun et al, 2001). Experiments led to conclude that the major oxidation product is gluconic acid (Kokoh et al, 1992b;Rao & Drake, 1969).…”