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Direct electrochemical determination of ascorbic acid by a cobalt(II) tetra-neopentyloxy phthalocyanine-multi-walled carbon nanotubes glassy carbon electrode

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Abstract

A cobalt(II) tetra-neopentyloxy phthalocyanine-multi-walled carbon nanotubes (CoTNPPc–MWNTs) composite was synthesized and characterized by UV–Vis spectra and transmission electron microscopy. The CoTNPPc–MWNTs glassy carbon electrode (CoTNPPc–MWNTs/GCE) was prepared by drop coating. The electrocatalytic performance of the chemically modified electrode was investigated for oxidation of ascorbic acid (AA). It was found that in phosphate buffer solution at pH = 6.60, the chemically modified electrode exhibited excellent electrocatalytic activity toward the oxidation of AA. The oxidation peak current increased linearly with the concentration of AA in the range of 10 μM–1.6 mM within the detection limit of 5 μM and low response time of 4 s.

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Acknowledgement

We gratefully acknowledge the support of this study by project of the National Natural Science Foundation (11179033), Beijing Natural Science Foundation (2102012) and Beijing Education Committee.

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Correspondence to Xia Zuo.

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Zuo, X., Li, N. & Zhang, H. Direct electrochemical determination of ascorbic acid by a cobalt(II) tetra-neopentyloxy phthalocyanine-multi-walled carbon nanotubes glassy carbon electrode. J Mater Sci 47, 2731–2735 (2012). https://doi.org/10.1007/s10853-011-6099-y

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  • DOI: https://doi.org/10.1007/s10853-011-6099-y

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