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A New Strategy for Immobilization of Electroactive Species on the Surface of Solid Electrode

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Abstract

This letter reports on a new method for immobilization of electroactive species on a solid electrode surface based on the composite film of naphthol green B (NGB) and Co–Al layered double hydroxides (LDHs). After the oxidation potential of Co(III)/(II) couple was dramatically enhanced by NGB, the functionalized LDHs exhibited a remarkable electrocatalytic activity toward the oxidation of hydrazine in a weak acidic medium. The amperometric response to hydrazine showed a linear range of 0.17 μM–400 mM, with the calculated detection limit of 0.1 μM at a signal-to-noise ratio of three and the sensitivity of the amperometric hydrazine sensor was found to be 35.26 μA μM−1. The modified electrode displayed an acceptable reproducibility and good stability. The new strategy is expected to have wide applications for changing of the potential of redox couple in metal oxides, hydroxides, double hydroxides, and so on.

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Acknowledgements

This work was supported by Natural Science Foundation of China (20801001 and 20875001) and the Science Foundation of Education Committee of Anhui Province (KJ2007B098). We also deeply appreciate the support of the foundation for doctor science research of Anhui Normal University.

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Authors and Affiliations

  1. Anhui Key Laboratory of Chemo-Biosensing, College of Chemistry and Materials Science, Anhui Normal University, Beijing East Road No. 1, Wuhu, 241000, China

    Yinling Wang, Lin Liu, Dandan Zhang, Shudong Xu & Maoguo Li

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  1. Yinling Wang
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  2. Lin Liu
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  3. Dandan Zhang
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  4. Shudong Xu
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  5. Maoguo Li
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Correspondence to Maoguo Li.

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Wang, Y., Liu, L., Zhang, D. et al. A New Strategy for Immobilization of Electroactive Species on the Surface of Solid Electrode. Electrocatal 1, 230–234 (2010). https://doi.org/10.1007/s12678-010-0030-1

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