聚合物/空心碳球/铂催化剂的制备及其性能研究

Preparation of polymer/hollow carbon spheres/platinum catalysts and its performance study

以含氮、硫杂环三联体(3,4-乙撑二氧噻吩封端,含氮六元杂环(哒嗪或吡啶)为中间单元)为单体,通过原位氧化聚合法制备了含杂原子共轭聚合物(Poly(EPE)或Poly(BPE))与不同含量双层空心碳纳米球(DLHCs)的二元复合物载体(Poly(EPE)/DLHCs和Poly(BPE)/DLHCs).通过UV-vis和CV分别对所有二元复合物进行结构表征和电化学性能测试,确定了Poly(EPE)/30 wt%DLHCs和Poly(BPE)/50 wt%DLHCs是聚合物与无机相比例最佳的复合物.将Pt NPs负载到此复合物基体中,得到了Poly(EPE)/DLHCs/Pt和Poly(BPE)/DLHCs/Pt复合材料.进一步研究了含氮、硫共轭聚合物修饰的复合材料对甲醇催化氧化性能的影响.其中,Poly(EPE)/DLHCs/Pt显示较好的电催化性能,即其电化学活性面积和质量活性电流密度分别为69.27和961.63 mA mg^(−1).

Binary complex carriers containing heteroatom-conjugated polymers(Poly(EPE)or Poly(BPE))and doublelayered hollow carbon nanospheres(DLHCs)with different contents were prepared by in situ oxidative polymerization using the heterocyclic triplets containing nitrogen and sulfur(the structure was capped with 3,4-ethylenedioxythiophene and pyridazine as intermediate unit)as monomers.The structures and electrochemical properties of all binary compounds were characterized by UV-vis and CV,respectively,and Poly(EPE)/30 wt%DLHCs and Poly(BPE)/50 wt%DLHCs were identified as the complexes with the best ratio of monomer to inorganic phase.Subsequently,Pt NPs were loaded into this complex matrix to obtain Poly(EPE)/DLHCs/Pt and Poly(BPE)/DLHCs/Pt composites.The effect of polymer-modified carbon materials,which containing pyridazine and pyridine rings as catalyst support,on the catalytic oxidation properties of methanol as well as the relationship between structure and performance were investigated.The results indicated that Poly(EPE)/DLHCs/Pt shows larger electrochemical active area(ECSA,69.27 m^(2) g^(−1))and higher mass current density(961.63 mA mg^(−1)).