Transition-Metal Phosphide/Sulfide Nanocomposites for Effective Electrochemical Non-Enzymatic Detection of Hydrogen Peroxide

In this work, we clearly demonstrate the use of a transition-metal phosphide/sulfide nanocomposite to set up an electrochemical reduction analysis platform for the sensitive and selective non-enzymatic detection of H₂O₂. With the help of a macroporous nickel foam (NF) as the substrate, the noble-metal-free electrocatalyst nanocomposites of Ni₃P and Ni₃S₂ were directly synthesized in one step on the surface of the NF. The Ni₃P-Ni₃S₂/NF based electrochemical sensors present excellent electrocatalytic activity for H₂O₂ reduction with a detection limit of approximately 0.3 μM and a large detection range, which guarantees the possibility of sensitive and reliable detection of H₂O₂.