Inverted-design for highly-active hydrogen evolution electrocatalyst of MoS2@Ni3S2 core-shell via unlocking the potential of Mo

Through inverted-design rather than modifying the generally-assumed S active sites in popular MoS 2 , we unlock the potential of Mo sites and successfully prepared novel MoS 2 @Ni 3 S 2 /NF core-shell nanospheres as a catalyst for the high-performance hydrogen evolution reaction (HER). The ΔG H at the Mo site is optimized via Ni 3 S 2 to achieve excellent HER activity. At low current densities, it has similar activity to the Pt/C. However, its performance is better than Pt/C at high density. Moreover, our catalyst shows a considerable stability at a variety of current densities for 50 h, promising to substitute noble metal catalysts in application of commercial alkaline electrocatalysts .