High-Performance Non-Enzyme Hydrogen Peroxide Detection in Neutral Solution: Using a Nickel Borate Nanoarray as a 3D...

Area of Science:

• Electrochemistry
• Materials Science
• Nanotechnology

Background:

• Enzyme-free nanoarray architectures offer advantages for catalysis due to high surface area and accessibility.
• Developing efficient 3D catalysts for hydrogen peroxide detection is crucial.

Purpose of the Study:

• To demonstrate nickel borate nanoarray supported on carbon cloth (Ni-Bi/CC) as an efficient catalyst electrode.
• To evaluate the performance of Ni-Bi/CC as a non-enzymatic electrochemical sensor for hydrogen peroxide (H₂O₂).

Main Methods:

• Fabrication of nickel borate nanoarray on carbon cloth (Ni-Bi/CC).
• Electrochemical characterization of Ni-Bi/CC for H₂O₂ electro-reduction in neutral media.
• Performance evaluation including response time, detection limit, and sensitivity.

Main Results:

• Ni-Bi/CC exhibited efficient catalytic activity for H₂O₂ electro-reduction.
• The sensor demonstrated superior performance: fast response (<3 s), low detection limit (0.85 nM), and high sensitivity (18320 μA cm⁻²).
• Favorable reproducibility and long-term stability were observed.

Conclusions:

• Ni-Bi/CC is a highly effective non-enzymatic electrochemical sensor for H₂O₂ detection.
• The nanoarray architecture provides excellent catalytic properties for H₂O₂ sensing.
• This material shows great potential for practical H₂O₂ detection applications.