Novel heterostructure CuS/NiS coral-like nanoarrays on Ni foam to enhance hydrogen evolution reaction in alkaline media.

Exploring efficient alternatives to precious noble metal catalysts is a challenge. Here, a new type of non-noble metal CuS/NiS heterostructure nanosheet array is fabricated on 3D Ni foam. This electrocatalyst has excellent activity and durability to Hydrogen Evolution Reaction (HER) under alkaline conditions.