Voltammetric determination of hydrogen peroxide using AuCu nanoparticles attached on polypyrrole-modified 2D metal-organic framework nanosheets


AuCu/PPy/Cu-TCPP nanocomposites were synthesized by attaching AuCu nanoparticles to a polypyrrole (PPy)-modified 2D Cu-TCPP metal-organic framework nanosheet; Cu-TCPP can exhibit catalytic activity for the reduction of H2O2. Based on the nanocomposite, a new method for the determination of H2O2 was established. The morphology of the AuCu/PPy/Cu-TCPP was analyzed by transmission electron microscopy. Cu-TCPP exhibited a 2D nanosheet with obvious wrinkles, and a large amount of AuCu was uniformly attached to PPy/Cu-TCPP. The composition and structure were studied by X-ray diffraction, FTIR, and X-ray photoelectron spectroscopy. At the optimal working potential and scan rate of − 0.55 V(vs. SCE) and 100 mV/s, respectively, electrochemical studies indicated that in N2-saturated supporting electrolyte, the method showed good catalytic performance for H2O2, with a detection limit of 6.67 nM (S/N = 3), a linear range of 7.10 μM–24.10 mM, and a sensitivity of 35.0 μA mM−1 cm2. Compared to H2O2 methods based on related materials, this method exhibits a wide linear range, and the detection limit is down to nanomolar.

Schematic presentation of the preparation of AuCu/PPy/Cu-TCPP nanocomposites.

AuCu/PPy/Cu-TCPP nanocomposite was prepared by loading gold–copper (AuCu) bimetallic nanoparticles with good catalytic properties on two-dimensional copper (II)-porphyrin (Cu-TCPP) nanosheet metal-organic framework material, whose conductivity was improved by polypyrrole (PPy). A method for the determination of hydrogen peroxide by voltammetric was established.

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The authors received financial support from the National Natural Science Foundation of China (No. 21575113).

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Correspondence to Jianbin Zheng.

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Ma, J., Zheng, J. Voltammetric determination of hydrogen peroxide using AuCu nanoparticles attached on polypyrrole-modified 2D metal-organic framework nanosheets. Microchim Acta 187, 389 (2020). https://doi.org/10.1007/s00604-020-04355-y

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  • Surfactant-assisted synthetic method
  • Added synergy
  • Alloy
  • Transition metals
  • Porphyrin