| 초록 |
The structure of a MoS2 layer strongly influences the chemical, physical, and electronic properties of the film. Also, it was demonstrated that controlling the macroscopic structure of MoS2 enhances the catalytic performance. Here, we report the preparation of a new wrinkled structure in edge-oriented MoS2 films over large areas simply by introducing a single graphene layer below the Mo film prior to MoS2 film growth. The wrinkled film was formed from MoS2 sheets aligned in both the vertical or horizontal directions with respect to the plane of the graphene surface. Vertically aligned MoS2 sheets dominated the bulk of the film, whereas horizontally aligned MoS2 sheets were favored near the graphene surface. The wrinkled MoS2 film provided a much better catalytic performance compared to smooth MoS2 structures, displaying a decreased onset potential from –0.32 V to –0.2 V vs. RHE in a hydrogen evolution reaction. Our findings present a new approach to enhancing the properties of MoS2 films by introducing wrinkle morphology. This approach may potentially be extended to the creation of wrinkle structures in other 2D materials. |
