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

Abstract 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 H 2 O 2 . With the help of a macroporous nickel foam (NF) as the substrate, the noble‐metal‐free electrocatalyst nanocomposites of Ni 3 P and Ni 3 S 2 were directly synthesized in one step on the surface of the NF. The Ni 3 P‐Ni 3 S 2 /NF based electrochemical sensors present excellent electrocatalytic activity for H 2 O 2 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 H 2 O 2 .