3R phase of MoS₂ and WS₂ outperforms the corresponding 2H phase for hydrogen evolution

Abstract

Herein, we compare the bulk, 2H and 3R phases of two most prevalent TMD materials: MoS₂ and WS₂. The 3R phase outperforms its 2H phase counterpart in hydrogen evolution reaction catalysis and is even comparable with the exfoliated, 1T phase in the case of MoS₂.