Carbon Encapsulated WS2 Nanocomposites Derived from ZIF-67@WS2 Core-Shell Nanoparticles and their electrocatalytic applications

In this work, Co 9 S 8 and N,S co-dopped carbon encapsulated WS 2 nanocomposites (Co 9 S 8 -N,S-C@WS 2 ) has been successfully prepared through a high-temperature carbonization of the precursor ZIF-67@WS 2 nanoparticles. The obtained Co 9 S 8 -N,S-C@WS 2 nanoparticles were confirmed to have a core-shell structure and uniform element distribution by TEM and element mapping. Its crystal structure was characterized by XRD, and the high specific surface areas with porous structure was characterized by BET tests. The as-prepared Co 9 S 8 -N,S-C@WS 2 nanoparticles exhibited a better ORR/OER/HER performance than single component. In this work, a novel idea for the preparation of functional nanocomposite materials could be provided.