Amperometric determination of hydrazine using a CuS-ordered mesoporous carbon electrode

Area of Science:

• Electrochemistry
• Materials Science
• Analytical Chemistry

Background:

• Hydrazine is a toxic environmental pollutant requiring sensitive detection methods.
• Electrocatalytic sensors offer a promising approach for detecting hazardous substances like hydrazine.
• Ordered mesoporous carbon (OMC) provides a high surface area scaffold for catalyst immobilization.

Purpose of the Study:

• To develop and characterize a novel electrocatalytic sensor for hydrazine detection.
• To investigate the electrochemical sensing performance of copper sulfide-ordered mesoporous carbon (CuS-OMC) composite.
• To evaluate the sensor's applicability in real water samples.

Main Methods:

• Synthesis of CuS-OMC composite via a solvothermal strategy and nanocasting.
• Characterization of CuS-OMC using microscopic and spectrochemical techniques.
• Electrochemical evaluation of CuS-OMC modified glassy carbon electrode (GCE) using cyclic voltammetry and amperometry.

Main Results:

• CuS-OMC modified GCE showed enhanced electrocatalytic activity for hydrazine sensing compared to bare GCE, CuS, and OMC.
• The sensor achieved a low detection limit of 0.10 μM and high sensitivity of 0.915 μA cm⁻² μM⁻¹.
• Accurate hydrazine detection was demonstrated in real water samples with recoveries around 97%.

Conclusions:

• The CuS-OMC composite is an effective electrocatalyst for sensitive and selective hydrazine detection.
• The developed sensor exhibits excellent stability and applicability for environmental monitoring.
• This work highlights the potential of OMC-based composites in electrochemical sensing applications.