A novel hydrogen peroxide sensor based on electrodeposited copper/cuprous oxide nanocomposites

Area of Science:

• Electrochemistry
• Materials Science
• Nanotechnology

Background:

• Hydrogen peroxide (H2O2) is a crucial analyte in biological and industrial processes.
• Sensitive and selective detection methods for H2O2 are essential.
• Nanomaterials offer unique properties for electrochemical sensing applications.

Purpose of the Study:

• To develop a sensitive electrochemical sensor for hydrogen peroxide (H2O2) determination.
• To synthesize and characterize copper/cuprous oxide (Cu/Cu2O) nanocomposites on FTO substrates.
• To evaluate the electrocatalytic activity and performance of the fabricated sensor.

Main Methods:

• Electrodeposition of Cu/Cu2O nanocomposites on fluorine-doped tin oxide (FTO) glass.
• Characterization using X-ray diffraction, SEM, EDS, and XPS.
• Electrochemical evaluation via linear sweep voltammetry and amperometry.

Main Results:

• Successfully synthesized Cu/Cu2O nanocomposites on FTO.
• The Cu/Cu2O/FTO electrode exhibited excellent electrocatalytic activity for H2O2 oxidation.
• Achieved a wide linear range (0.2–2000 μM) and a low detection limit (0.04 μM) for H2O2.
• Demonstrated successful application in milk sample analysis.

Conclusions:

• The synergistic effect of Cu and Cu2O enhances electrocatalytic performance.
• The developed sensor provides sensitive and reliable H2O2 detection.
• Electrodeposited Cu/Cu2O nanocomposites are promising for electrochemical sensor development.