A glassy carbon electrode modified with ordered nanoporous

Co₃O₄for non-enzymatic sensing of glucose

Mingbo Zheng¹, Lulu Li¹, Peng Gu¹, Zixia Lin¹, Huaiguo Xue¹and Huan Pang^1,2

1School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China

2College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455002, China

AbstractOrdered porous Co₃O₄materials with pore sizes of 5 nm (Co₃O₄–5), 20 nm (Co₃O₄–20), and 70 nm (Co₃O₄–70) have been synthesized via a hard-template method and were studied as catalysts to bring insight into non-enzymatic electrochemical sensing of glucose. A glassy carbon electrode modified with Co₃O₄–70 responds more quickly and sensitively to glucose than those modified with Co₃O₄–5 or Co₃O₄–20. The sensor based on the use of Co₃O₄–70 and operated at a working voltage of 0.6 V (vs. Ag/AgCl) in 0.1 M NaOH solution shows a lower detection limit of 0.025 μM, good repeatability and high selectivity over ascorbic acid, uric acid, dopamine, and KCl. These results suggest that ordered porous Co₃O₄is a promising material for quantitative electrochemical determination of glucose, and that the pore size has a strong effect on performance.

Microchim. Acta(2017) 184:943–949IF: 4.831

文章链接：http://link.springer.com/10.1007/s00604-017-2079-5