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Synthesis of Se single atoms on nitrogen-doped carbon as novel electrocatalyst for sensitive nonenzymatic sensing of hydrogen peroxide

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Abstract

Single-atom catalysts received increasing attention due to their maximum atom utilization efficiency. However, metal-free single atoms have not been used to construct electrochemical sensing interfaces. In this work, we demonstrated the use of Se single atoms (SA) as electrocatalyst for sensitive electrochemical nonenzymatic detection of H2O2. Se SA was synthesized and anchored on nitrogen-doped carbon (Se SA/NC) via a high-temperature reduction strategy. The structural properties of Se SA/NC were characterized by transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and electrochemical techniques. The results showed that Se atoms were uniformly distributed on the surface of the NC. The obtained SA catalyst exhibited excellent electrocatalytic activity toward H2O2 reduction, and can be used to detect H2O2 in a wide linear range from 0.04 mM to 11.1 mM with a low detection limit of 0.018 mM and high sensitivity of 403.9 µA mM−1 cm−2. Moreover, the sensor can be used for the quantification of H2O2 concentration in real disinfectant samples. This work is of great significance for expanding the application of nonmetallic single-atom catalysts in the field of electrochemical sensing.

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Se single atoms (Se SA) as novel electrocatalyst were synthesized and anchored on nitrogen-doped carbon (NC) for sensitive electrochemical nonenzymatic detection of H2O2

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Acknowledgements

This work is financially supported by National Natural Science Foundation of China (No. 21575002). Natural Science Foundation of Anhui Province (No. 2108085MB66).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan, 243002, China

    Chengcheng Qi & Yongping Dong

  2. School of Mathematical Sciences, Qufu Normal University, Qufu, 273165, China

    Chengcheng Qi

  3. State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China

    Wei Wang

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  1. Chengcheng Qi
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Correspondence to Wei Wang or Yongping Dong.

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Wei Wang is Editor of Analytical and Bioanalytical Chemistry but was not involved in the peer review of this paper. The other authors declare that they have no conflict of interest.

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Qi, C., Wang, W. & Dong, Y. Synthesis of Se single atoms on nitrogen-doped carbon as novel electrocatalyst for sensitive nonenzymatic sensing of hydrogen peroxide. Anal Bioanal Chem 415, 5391–5401 (2023). https://doi.org/10.1007/s00216-023-04814-4

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  • DOI: https://doi.org/10.1007/s00216-023-04814-4

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