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

It is highly attractive to construct natural enzyme-free nanoarray architecture as a 3D catalyst for hydrogen peroxide detection due to its great specific surface area and easy accessibility to target molecules. In this communication, we demonstrate that nickel borate nano-array supported on carbon cloth (Ni-Bi/CC) behaves as an efficient catalyst electrode for H2O2 electro-reduction in neutral media. As a non-enzymatic electrochemical H2O2 sensor, such Ni-Bi/CC shows superior sensing performances with a fast response time (less than 3 s), a low detection limit (0.85 nm, S/N = 3), and a high sensitivity (18320 mu A mM cm(-2)). Importantly, it also demonstrates favourable reproducibility and long-term stability.