A novel Au-Pt@PPy(polypyrrole) coral-like structure: Facile synthesis, high SERS effect, and good electro catalytic activity

• Published in: Journal of colloid and interface science Vol. 396; pp. 23 - 28
• Main Authors: Wang, Weina, Gao, Yingchun, Jia, Xudong, Xi, Kai
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 15.04.2013; Elsevier
• Subjects: Catalysis; catalytic activity; Chemistry; Colloidal state and disperse state; Electrochemical catalytic; Electrochemistry; Exact sciences and technology; General and physical chemistry; methanol; Nanoparticles; Noble metal; oxidation; Physical and chemical studies. Granulometry. Electrokinetic phenomena; roughness; scanning electron microscopy; SERS; spectroscopy; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; transmission electron microscopy; Nanoparticles; Electrochemical catalytic; Noble metal; SERS; Catalytic reaction; Synthesis; Nanoparticle; Electrochemistry; Structure; Pyrrole polymer
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2012.12.059

[Display omitted] ► The Au, Pt, and polypyrrole nano-complexes (Au–Pt@PPy) were synthesized by a facile one-pot reaction. ► The formation of Au–Pt@PPy was studied. ► The products had novel three-dimensional (3D) multi-branch structures, and the structures were controllable. ► The Raman signals on the surface of Au–Pt@PPy were obviously enhanced. ► The Au–Pt@PPy had high catalytic efficiency for methanol oxidation. The Au–Pt@PPy(polypyrrole) with a novel three-dimensional structure was synthesized by a facile one-pot reaction. Raman spectra, transmission electron microscopy (TEM), scanning electron microscopy (SEM), UV–vis spectroscopy (UV–vis), and cyclic voltammograms (CV) were employed to characterize the complex. TEM and SEM results indicated that the products had novel three-dimensional (3D) multi-branch structures, which were controllable by simply adjusting the ratios of HAuCl4 to H2PtCl6 added. Raman characterization proved that the products had significant surface-enhanced Raman effect with the aid of long-range effect of the enhanced electromagnetic (EM) field and roughness in nanometer-scale. CV results showed that the Au–Pt@PPy with coral-like structure had high catalytic efficiency for methanol oxidation.