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

Abstract

In this work, Co9S8 and N,S co-dopped carbon encapsulated WS2 nanocomposites (Co9S8-N,S-C@WS2) has been successfully prepared through a high-temperature carbonization of the precursor ZIF-67@WS2 nanoparticles. The obtained Co9S8-N,S-C@WS2 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 Co9S8-N,S-C@WS2 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.