Heterostructured ZnIn₂S₄/Ni₂P/NiS on Nickel Foam as Self-Supported pH-All Electrocatalysts for Hydrogen Evolution

The existing approach of preparing hydrogen through electrocatalytic water splitting is hindered by several factors, including the scarcity of efficient electrocatalysts for the hydrogen evolution reaction that can function well under a variety of pH settings. The development of compounds with diverse active ingredients could contribute to the heterostructured electrocatalysts’ ability to effectively react with a range of reactants. Moreover, assembling active species on a substrate to produce self-supported electrocatalysts can reduce the need for electricity. Here, we utilized nickel foam as the conductive substrate to produce heterostructured electrocatalysts with active species of ZnIn 2 S 4, Ni 2 P, and NiS (denoted as ZnIn 2 S 4 /Ni 2 P/NiS@NF). The ZnIn 2 S 4 /Ni 2 P/NiS@NF only needs tiny overpotentials to drive high current densities and can be operated with long-term operational durability across a broad pH range.