Ni3S2@MoO3 core/shell arrays on Ni foam modified with ultrathin CdS layer as a superior electrocatalyst for hydrogen evolution reaction

Abstract

An ultrathin CdS layer-modified MoO₃/Ni₃S₂ hierarchical nanoarray on Ni foam exhibits ultrahigh electrocatalytic activity towards the hydrogen evolution reaction with a small overpotential of 30 mV at −10 mA cm⁻² due to the synergistic effect of easy electron transfer among CdS, MoO₃ and Ni₃S₂/NF and the well-designed structure, which outperforms the current non-noble electrocatalysts.