Effect of monomer concentration on interfacial synthesis of platinum loaded polyaniline nanocomplex using poly(styrene sulfonic acid)

Abstract

Polyaniline–poly(styrene sulfate)–platinum (PANI–PSS–Pt) composites were prepared via interfacial synthesis. Polymerization of aniline and an incorporation of platinum (Pt) in polyaniline (PANI) were carried out simultaneously by using H 2PtCl 6 as an oxidizing agent in poly(styrene sulfonic acid) solution. To find an optimal synthesis condition, PANI–PSS–Pt composites were prepared with different mole ratio of aniline monomer and platinum precursor concentration. Resulting composites were compared with PANI–Pt–PSS composites prepared by using non-interfacial synthesis method. Doping degree and electronic structure of PANI–PSS–Pt composites were characterized by UV–Vis absorption spectroscopy. The morphological structures of PANI–PSS–Pt were evaluated by using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrochemical behaviors of PANI–PSS–Pt were investigated according to their characteristic current–voltage curves. PANI–PSS–Pt composite synthesized in 0.05 M monomer concentration showed smaller cluster size of composites and the highest current density value of 0.45 mA/mg.