Phase Engineering of W‐Doped MoS2 by Magneto‐Hydrothermal Synthesis for Hydrogen Evolution Reaction

Abstract

AbstractMolybdenum disulfide (MoS2) has been proved as an excellent potential hydrogen evolution reaction (HER) catalyst. Compared with thermodynamically stable 2H‐MoS2, 1T‐MoS2 exhibits higher conductivity and catalytic activity, whereas it is usually difficult to prepare since of thermodynamically metastable. Herein, a feasible method is reported to fabricate ambient‐stable MoS2 with high concentration 1T phase through magnetic free energy synergistic microstrain induced by W doping under low magnetic field. The 1T phase proportion in MoS2 can be as high as 80% and is ambient‐stable for more than one year. The catalyst prepared under a magnetic field of 3 T delivers an overpotential of 195 mV at a current density of 10 mA cm−2 and has a long‐term stability over 50 h. This work provides a novel strategy for preparation of MoS2 with high 1T concentration and high stability.