Cobalt phosphide nanowires: an efficient electrocatalyst for enzymeless hydrogen peroxide detection

Area of Science:

• Electrochemistry
• Materials Science
• Nanotechnology

Background:

• Electrochemical detection of hydrogen peroxide (H2O2) is crucial in various fields.
• Development of sensitive, selective, and stable nonenzymatic sensors is an ongoing challenge.

Purpose of the Study:

• To demonstrate the efficacy of cobalt phosphide nanowires (CoP NWs) as a novel material for the electrochemical detection of H2O2.
• To evaluate the performance of CoP NWs as an enzymeless H2O2 sensor.

Main Methods:

• Synthesis and characterization of cobalt phosphide nanowires (CoP NWs).
• Electrochemical measurements using CoP NWs for H2O2 detection via amperometry.

Main Results:

• CoP NWs exhibit remarkable catalytic activity for electrochemical H2O2 detection.
• The enzymeless sensor demonstrated a fast amperometric response (<5 s) and a low detection limit (0.48 μM).
• The sensor showed good selectivity, long-term stability, and excellent reproducibility.

Conclusions:

• Cobalt phosphide nanowires are highly effective for sensitive and selective enzymeless electrochemical detection of H2O2.
• CoP NWs present a promising alternative to traditional enzymatic sensors for H2O2 monitoring.