Preparation of PdxAuy bimetallic nanostructures with controllable morphologies supported on reduced graphene oxide nanosheets and wrapped in a polypyrrole layer. Issue 107 (15th October 2015)

• Record Type: Journal Article
• Authors: Yao, Tongjie; Zuo, Quan; Wang, Hao; Wu, Jie; Zhang, Xiao; Sun, Jianmin; Cui, Tieyu
• Is Part Of: RSC advances. Volume 5:Issue 107(2015)
• Page Start: 87831
• Page End: 87837
• Publication Date: 2015-10-15
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra17081h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A one-step method to prepare reduced graphene oxide/Pd x Au y /polypyrrole composites with good catalytic activity was introduced. The morphologies of alloy nanostructures could turn to be spherical, coral-like and porous cluster-like. Abstract : In this paper, we have introduced a one-step method to prepare Pd x Au y bimetallic nanostructures supported on reduced graphene oxide (rGO) nanosheets and wrapped in a polypyrrole (PPy) layer. By using a pyrrole monomer as a special reducing agent for metal salts, the morphologies of Pd x Au y bimetallic nanostructures could be easily turned to be spherical, coral-like and porous cluster-like via simply changing dosage or molar ratio of PdCl2 and HAuCl4 ·4H2 O. The roles of the pyrrole monomer and rGO support in formation of rGO/Pd x Au y /PPy composites were investigated in detail. Transmission electron microscopy, elemental mapping analysis, X-ray diffraction, X-ray photoelectron spectroscopy and Fourier-transform infrared spectra were used to characterize their morphologies, structures and compositions. Compared with corresponding rGO/Pd/PPy and rGO/Au/PPy composites, the as-prepared rGO/Pd x Au y /PPy composites displayed enhanced catalytic activity towards the reduction of 4-nitrophenol.