Macro-/meso-porous NiCo 2 O 4 synthesized by template-free solution combustion to enhance the performance of a nonenzymatic amperometric glucose sensor

A sensitive nonenzymatic amperometric glucose sensor is described that relies on a glassy carbon electrode modified with a macro-/meso-porous NiCo O . NiCo O with spinel structure has been prepared via a one-step solution combustion method. The material was characterized by X-ray diffraction, scanni...

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Bibliographic Details
Published inMikrochimica acta (1966) Vol. 187; no. 1; p. 64
Main Authors Xiao, Xuechun, Zhang, Xuanming, Zhang, Zhanyu, You, Junda, Liu, Sirui, Wang, Yude
Format Journal Article
LanguageEnglish
Published Austria 18.12.2019
Subjects
Electrocatalysis
Amperometric detection
Porous NiCo2O4
Non-enzymatic sensor
Template free synthesis
Co3O4
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Summary:A sensitive nonenzymatic amperometric glucose sensor is described that relies on a glassy carbon electrode modified with a macro-/meso-porous NiCo O . NiCo O with spinel structure has been prepared via a one-step solution combustion method. The material was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen absorption/desorption. An electrode was coated with the porous material and then displayed excellent electrocatalytic activity towards the direct oxidation of glucose in 0.15 M NaOH solution by cyclic voltammetry. Amperometric I-t curve demonstrated a sensitivity of 2100 μA·mM ·cm at an applied potential of 0.45 V (vs Hg/HgCl). The sensor has a linear response in the 0.001 to 1.0 mΜ glucose concentration range, a fast response time (3.9 s) and a low detection limit (0.38 μΜ). Graphical abstract.
ISSN:1436-5073