Facile synthesis of MoS2/CuS nanoflakes as high performance electrocatalysts for hydrogen evolution reaction.

The fabrication of metal sulfides heterostructure is a promising strategy for enhancing catalytic activity. Herein, the MoS 2 /CuS heterostructure was successfully grown on carbon cloth (MoS 2 /CuS/CC) through an efficient method. The SEM results confirmed that the fabricated MoS 2 /CuS/CC composites have a flake morphology, which can not only improves the surface area but also offers ample surface catalytic active sites. Particularly, the optimized MoS 2 /CuS/CC-2 electrocatalyst showed a small overpotential of 85 mV@10 mA cm−2 and exceptional long-term cycling durability for hydrogen evolution in 1 M KOH. The outstanding catalytic activity is attributed to the fact that the combination of MoS 2 with CuS can greatly enhance the charge transport rate and improve the structural stability. These results suggest that the MoS 2 /CuS/CC heterostructure is a potential electrocatalyst for hydrogen production. [Display omitted] • Flakes-shaped MoS 2 /CuS/CC electrocatalysts were successfully fabricated. • The MoS 2 /CuS/CC electrocatalysts can offer ample surface catalytic active sites. • The MoS 2 /CuS/CC electrocatalyst shows low overpotential of 85 mV@10 mA cm−2 for HER. • The MoS 2 /CuS/CC electrocatalyst presents excellent long-term cycling stability. [ABSTRACT FROM AUTHOR]