Hybrid Ni3S2–MoS2 nanowire arrays as a pH-universal catalyst for accelerating the hydrogen evolution reaction

Abstract

Hybrid Ni₃S₂–MoS₂ NWAs/NF, hybrid Ni₃S₂–MoS₂ nanowire arrays in situ grown on Ni foam via a two-step hydrothermal method, can achieve cathodic current densities of 10 mA cm⁻² and 100 mA cm⁻² at overpotentials of 99 mV and 260 mV in 1.0 M KOH and 111 mV and 194 mV in 0.5 M H₂SO₄, respectively. It still needs an overpotential of 103 mV at 10 mA cm⁻² in 0.1 M PBS. This work opens a new avenue for designing heterogeneous active electrocatalysts for energy conversion and storage.