Activating MoS2 by interface engineering for efficient hydrogen evolution catalysis.

Graphical abstract Herein, we proposed a facile strategy for the design of Au-MoS 2 nanoparticles with abundant edge sites and regular core-shell structure through the interface engineering. Highlights • Activating the pristine MoS 2 by introducing MoS 2 into core shell heterostructures through the interface engineering. • CNFs served as reactor and support to control the heterostructures of Au and MoS 2. • The Au-MoS 2 /CNFs exhibits the overpotential of 92 mV (10 mA cm−2) and a Tafel slope of 126 mV dec−1. Abstract Transition metal sulfides have been widely investigated and used as efficient catalysts for hydrogen evolution reactions (HER). However, the trade-off between catalytic activity and long-term stability represents a formidable challenge and has not been extensively addressed. Herein, we proposed a facile strategy for the design of Au-MoS 2 nanoparticles with abundant edge sites and regular core-shell structure through the interface engineering. The electrospun carbon nanofibers (CNFs) served as reactors and supports to control the preparation of core-shell heterostructures. Core-shell heterostructure exhibits more excellent catalytic than single component resulting from the synergistic effects at nano-interface. The obtained Au-MoS 2 /CNFs catalyst yield a current density of 10 mA cm−2 at the overpotential of 92 mV and a Tafel slope of 126 mV dec−1. Particularly, the durability of catalyst is relatively stable at the 50 h. The successful synthesis of core-shell nanocrystals provides a new path for designing advanced electrocatalysts. [ABSTRACT FROM AUTHOR]