Sugars Electrooxidation at Glassy Carbon Electrode Decorate with Multi-Walled Carbon Nanotubes with Nickel Oxy-Hydroxide
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Data
2014-12-01
Título da Revista
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Editor
Esg
Resumo
The glassy carbon electrode modified with carbon nanotubes decorated with nickel oxy-hydroxide (GC/MWCNT/NiOOH) was used to studied electro-oxidation of glucose, galactose, xylose, arabinose and mannose in alkaline medium. Kinetic parameters such as, charge-transfer coefficient, electrocatalytic rate constant and diffusion coefficient were determined for sugars. Galactose exhibited a higher charge-transfer coefficient (0.37) with a diffusion coefficient of 1.3x10(-6) cm(2) s(-1) and showed the higher electrocatalytic rate constant of 2.1x10(4) L mol(-1) s(-1). The modified electrode exhibited a linear response to sugars concentration in the range around of 2.5x10(-4) mol L-1 to 5.6x10(-3) mol L-1 and limits of detection around of 1.9x10(-4) mol L-1 -4.3x10(-4) mol L-1.
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Electrocatalytic rate constant of sugars, Kinetic parameters, Nickel oxy-hydroxide, Carbon nanotubes, Chemically modified electrodes
Como citar
International Journal Of Electrochemical Science. Belgrade: Esg, v. 9, n. 12, p. 7746-7762, 2014.