| Based on the excellent properties of graphene and ionic liquid, firstly, we have synthetized a novel perylene-connected imidazolium ionic liquid, which can be firmly attached on graphene sheets through noncovalent π-π stacking. The resultant hybrid is well dispersed and preserves the desired properties of graphene itself. Then, we have prepared a new type of three-component metal/PTCDI-ILs/GS heterostructure via one-step chemical reduction process using the above material as a support. Our work is developed from following two cataltsts:Au/PTCDI-ILs/GS and Pd/PTCDI-ILs/GS.(1) For the as-prepared Au catalyst, the structure and properties are characterized by TEM, Raman, XRD, ICP-AES and XPS. Form the view of morphology, the unique properties of ionic liquid lead uniform deposition of smaller sized metal catalysts on the graphene surface. The catalytic properties for the catalytic reduction of4-nitrophenol are monitored by measuring the change UV-Vis absorbance. Au/PTCDI-ILs/GS uses half time to complete the process compared with Au/GS, which indicates the Au/PTCDI-ILs/GS had a high catalytic activity for this reaction. Furthermore, the catalyst exhibits almost constant catalytic activity for at least five successive cycles.(2) For the as-prepared Pd catalyst, we also characterized the catalyst by TEM, Raman, ICP-AES and XRD. For electrochemical reactions of alcohol oxidation, the catalyst shows much enhanced catalysis and better reusability than direct loading type catalyst Pd/GS. Meanwhile we have discussed the influence of ionic liquids for the catalytic activity and found that10%is the optimal concentration. Finally, PdRu alloys with different proportions were studied, and the catalyst with Pd Ru ratio of6:1has the best stability. |
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