Carbon-coated MoSe2/Mo2CTx (MXene) heterostructure for efficient hydrogen evolution

Herein, a mesh carbon-coated MoSe2/Mo2CTx hybrid material (MoSe2/Mo2CTx@C) is proposed as an effective catalyst for electrochemical hydrogen evolution reaction (HER). On one hand, the highly conductive Mo2CTx substrate enhanced charge transfer ability and effectively prevented the agglomeration of MoSe2 nanosheets to expose abundant active sites. On the other hand, the carbon coating layer further improved the conductivity and effectively prevented Mo2CTx from being oxidized in the environment. Consequently, the unique MoSe2/Mo2CTx@C hybrid material exhibited excellent HER performance. Specifically, the MoSe2/Mo2CTx@C catalyst only required an overpotential of 108.3 mV to reach a current density of 10 mA cm(-2) and displayed excellent durability under long-term cycling in acidic solution. This research highlights the potential applications of MXene-based composite materials in the energy field.