A novel nonenzymatic hydrogen peroxide amperometric sensor based on AgNp@GNR nanocomposites modified screen-printed carbon electrode

A nonenzymatic hydrogen-peroxide sensor was developed by utilization of silver nanoparticles and graphenenanoribbons. The mentioned composite was inflicted on a screen-printed carbon electrode which provides disposable,ready-to-use sensor. The structure and morphology of the nanocomposite were analyzed by scanning electron microscopyand X-ray diffraction. The sensor has excellent performance toward H2O2 amperometric detection. Figures ofmerit include dynamic response range from 0.05 to 5 mM and detection limit of 20 μM (at S/N =3). The fabricatedsensor was used for the determination ofH2O2 in milk samples. The obtained results showed that the proposed AgNp@GNR/SPCE sensor can be used for the determination of hydrogen peroxide in real samples. This is the peer-reviewed version o the article: V. Stanković, S. Đurđić, M. Ognjanović, et al., A novel nonenzymatic hydrogen peroxide amperometric sensor based on AgNp@GNR nanocomposites modified screen-printed carbon electrode, Journal of Electroanalytical Chemistry (2020), 876, 114487, doi: [https://doi.org/10.1016/j.jelechem.2020.114487] Published version: [http://cer.ihtm.bg.ac.rs/handle/123456789/3612]