Artigo
Sugars Electrooxidation at Glassy Carbon Electrode Decorate with Multi-Walled Carbon Nanotubes with Nickel Oxy-Hydroxide
Registro en:
International Journal Of Electrochemical Science. Belgrade: Esg, v. 9, n. 12, p. 7746-7762, 2014.
1452-3981
WOS:000345261900081
0072173018005712
4328309612941987
Autor
Sa, Acelino Cardoso de [UNESP]
Paim, Leonardo Lataro [UNESP]
Stradiotto, Nelson Ramos [UNESP]
Resumen
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. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Univ Estadual Paulista, UNESP, Inst Chem, Dept Analyt Chem, BR-14800060 Araraquara, SP, Brazil Univ Estadual Paulista, UNESP, BR-19274000 Rosana, SP, Brazil Univ Estadual Paulista, UNESP, Inst Chem, Dept Analyt Chem, BR-14800060 Araraquara, SP, Brazil Univ Estadual Paulista, UNESP, BR-19274000 Rosana, SP, Brazil FAPESP: 11/19289-5 FAPESP: 12/00258-5 FAPESP: 11/20416-1