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

► 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.