Preparation of PdxAuy bimetallic nanostructures with controllable morphologies supported on reduced graphene oxide nanosheets and wrapped in a polypyrrole layer

Tongjie Yao; Quan Zuo; Hao Wang; Jie Wu; Xiao Zhang; Jianmin Sun; Tieyu Cui

doi:10.1039/C5RA17081H

Preparation of Pd_xAu_y bimetallic nanostructures with controllable morphologies supported on reduced graphene oxide nanosheets and wrapped in a polypyrrole layer†

Tongjie Yao,^ab Quan Zuo,^a Hao Wang,^a Jie Wu,^c Xiao Zhang,^ab Jianmin Sun*^ab and Tieyu Cui*^b

* Corresponding authors

^a State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
E-mail: sunjm@hit.edu.cn

^b The Academy of Fundamental and Interdisciplinary Science, Harbin Institute of Technology, Harbin 150080, China
E-mail: cuit@hit.edu.cn

^c Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China

Abstract

In this paper, we have introduced a one-step method to prepare Pd_xAu_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_xAu_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 HAuCl₄·4H₂O. The roles of the pyrrole monomer and rGO support in formation of rGO/Pd_xAu_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_xAu_y/PPy composites displayed enhanced catalytic activity towards the reduction of 4-nitrophenol.

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Article information

DOI: https://doi.org/10.1039/C5RA17081H
Article type: Paper
Submitted: 24 Aug 2015
Accepted: 07 Oct 2015
First published: 09 Oct 2015

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RSC Adv., 2015,5, 87831-87837

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Preparation of Pd_xAu_y bimetallic nanostructures with controllable morphologies supported on reduced graphene oxide nanosheets and wrapped in a polypyrrole layer

T. Yao, Q. Zuo, H. Wang, J. Wu, X. Zhang, J. Sun and T. Cui, RSC Adv., 2015, 5, 87831 DOI: 10.1039/C5RA17081H

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