Electrochemical hydrogen peroxide sensor based on carbon supported Cu@Pt core-shell nanoparticles

Area of Science:

• Electrochemistry
• Nanomaterials Science
• Chemical Sensing

Background:

• Developing efficient electrocatalysts is crucial for sensitive chemical detection.
• Platinum-based catalysts are widely used but can be expensive and limited in activity.
• Nanocomposite materials offer opportunities to enhance catalytic performance.

Purpose of the Study:

• To synthesize and characterize Copper-Platinum on Carbon (Cu@Pt/C) nanocomposites.
• To evaluate the electrocatalytic activity of Cu@Pt/C for hydrogen peroxide reduction.
• To assess the potential of Cu@Pt/C as a sensor material.

Main Methods:

• Two-step reduction method for synthesizing Cu@Pt/C nanocomposites.
• Electrochemical techniques to study the catalytic activity and sensor performance.
• Analysis of linear range, sensitivity, detection limit, stability, reproducibility, and selectivity.

Main Results:

• Cu@Pt/C nanocomposites exhibited superior electrocatalytic activity for hydrogen peroxide reduction compared to Pt/C.
• The sensor demonstrated a wide linear range (0.50 μM to 32.56 mM).
• High sensitivity (351.3 μA mM⁻¹ cm⁻²) and a low detection limit (0.15 μM) were achieved.

Conclusions:

• Cu@Pt/C nanocomposites are effective electrocatalysts for hydrogen peroxide reduction.
• The developed sensor shows excellent long-time stability, reproducibility, and selectivity.
• Cu@Pt/C based sensors hold promise for practical applications in chemical sensing.