Construction of a C@MoS2@C sandwiched heterostructure for accelerating the pH-universal hydrogen evolution reaction

Abstract

Herein a facile and versatile hydrothermal method has been developed to construct a polypyrrole-derived carbon nanotube (PCN), MoS₂ nanosheets and a carbon shell integrated sandwich-like heterostructure (PCN@MoS₂@C). This heterostructure shows excellent performance in the hydrogen evolution reaction (HER) over a wide pH range. The results indicate that the porous carbon shell coated heterostructure provides MoS₂ nanosheets with sufficient conductivity, increased number of active sites, and strong structural stability, and thus boosts its HER performance.