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

Abstract

: Binary complex carriers containing heteroatom-conjugated polymers (Poly(EPE) or Poly(BPE)) and double-layered 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 ).