Electrochemical Determination of Hydrogen Peroxide Using a Glassy Carbon Electrode Modified with Three-Dimensional Copper Hydroxide Nanosupercages and Electrochemically Reduced Graphene Oxide

ABSTRACT

Three-dimensional copper hydroxide nanosupercages and electrochemically reduced graphene oxide were used to modify the glassy carbon electrode for the selective determination of hydrogen peroxide. The morphology and electrochemistry properties of copper hydroxide nanosupercage/electrochemically reduced graphene oxide/glassy carbon electrode were characterized using transmission electron microscopy, scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectra, Raman spectra, cyclic voltammetry, and electrochemical impedance spectroscopy. The resulting copper hydroxide nanosupercage/electrochemically reduced graphene oxide/glassy carbon electrode showed favorable performance for the electrocatalytic reduction of hydrogen peroxide. The amperometric current–time curve of the electrochemical sensor exhibited a wide linear range from 0.5 to 1030 µM with a limit of detection of 0.23 µM at a signal-to-noise ratio of three. Moreover, the sensor provided favorable selectivity, reproducibility, and stability and was used for the determination of H₂O₂ in tap water.

KEYWORDS:

• Copper hydroxide nanosupercages
• electrochemical sensor
• electrochemically reduced graphene oxide
• hydrogen peroxide

Additional information

Funding

This work was financially supported by the National Natural Science Foundation of China (NSFC-21305061), the Natural Science Foundation of Jiangxi Province (20171BAB203018 and 20151BAB203021), the Jiangxi Provincial Department of Education (GJJ160006 and GJJ160204), the Open Funds of the State Key Laboratory of Electroanalytical Chemistry (SKLEAC201802), and the State Key Laboratory of Chemo/Biosensing and Chemometrics of Hunan University (SKLCBC-2013010).