title: Carbohydrates electrocatalytic oxidation using CNT-NiCo-oxide modified electrodes.
abstract: A new sensor for an amplified electrochemical detection of carbohydrates is proposed, where carbohydrates are oxidized by CNT-NiCo-oxide composite in basic solutions. Cyclic voltammograms of the modified electrode show a stable and well defined redox couple in alkaline media due to the synergy of Ni(II)/Ni(III) system with Co(II)/Co(III). The modified electrode shows excellent electrocatalytic activity towards monosaccharides oxidation at reduced overpotential in alkaline solutions. Six monosaccharides were determined amperometrically at the surface of this modified electrode with high sensitivity over a wide range of concentrations, from 0.02 up to 12.12 mM. Low detection limit of 5 μM for glucose could be obtained.
authors.affiliation: Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania.
authors.forename: Adina
authors.initials: A
authors.lastname: Arvinte
authors.forename: Adama-Marie
authors.initials: AM
authors.lastname: Sesay
authors.forename: Vesa
authors.initials: V
authors.lastname: Virtanen
mesh_terms: D002241:Carbohydrates / Q000737:chemistry*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D002241:Carbohydrates; D037742:Nanotubes, Carbon; D010087:Oxides; D003035:Cobalt; D009532:Nickel