Construction\nof COFs@MoS<sub>2</sub>‑Pd Hierarchical\nTubular Heterostructures for Enhanced Catalytic Performance

Here, we report ternary COFs@MoS<sub>2</sub>-Pd hybrids\nwith an\ninnovative self-sacrificial approach. MoO<sub>3</sub>@Covalent organic\nframeworks (COFs) microcables were first prepared and then two-dimensional\nMoS<sub>2</sub> nanosheets (NSs) were integrated onto the surface\nof COFs, as COFs@MoS<sub>2</sub>, after treatment with hydrothermal\nreaction. The MoS<sub>2</sub> NSs were used as an excellent support\nto introduce Pd nanoparticles (NPs) thanks to their reducing ability\nfor the formation of the ternary COFs@MoS<sub>2</sub>-Pd hybrids.\nWhile COF microtubes improved the electrical conductivity of the hybrid\nmaterials, they also decreased the aggregation of MoS<sub>2</sub> NSs,\nas a contribution to the enhanced catalytic performance. The mild\nreaction between MoS<sub>2</sub> and Pd<sup>2+</sup> ions realized\nthe dense distribution of Pd NPs onto COFs@MoS<sub>2</sub> for abundant\nactive sites to further improve the catalytic performance. Thus, the\nhierarchical MoS<sub>2</sub>-based ternary hybrids were prepared with\nthe enhanced catalytical performance as validated with the enzyme-like\ncatalysis and the reduction of 4-nitrophenol.