Figure 1 schematically shows the coating of 2D nanosheets and metal nanoparticle (NP)nanosheet composite with MOFs. For example, MoS2 nanosheets and Pt-MoS2 composite (Figure S1 in the Supporting Information) were prepared by our previously devel- oped methods,8,27 and then used as 2D template for the surface coating of ZIF-8 (see Methods and Materials for the detailed experimental procedure). Briefly, aqu- eous solutions of 2-methylimidazole (MIM, C4H6N2) and zinc acetate (Zn(CH3COO)2 3 2H2O) were mixed at ambient conditions in the presence of the aforemen- tioned 2D templates with mild shaking. The mixture was then left undisturbed for 2 h before centrifugation, washing, and vacuum drying. The successful coating of ZIF-8 on MoS2 and Pt-MoS2 to form coreshell struc- tures, i.e., MoS2@ZIF-8 and Pt-MoS2@ZIF-8, respectively, was indicated by transmission electron microscopy