Facile Synthesis of Bimetallic Au@Pd Nanoparticles with Core-shell Structures on Graphene Nanosheets
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2014年第11期
论文作者：Nanting Li Shaochun Tang Xiangkang Meng
文章页码：1071 - 1077
摘 要：In this paper, we report a simple one-step thermal reducing method for synthesis of bimetallic Au@Pd nanoparticles with core-shell structures on the graphene surface. This new type of Au@Pd e G composites is characterized by transmission electron microscopy, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. It is found that Au@Pd nanoparticles with an average diameter of 11 nm are well dispersed on the graphene surface, and the Au core quantity as well as the Pd shell thickness can be quantitatively controlled by loading different amounts of metallic precursors, and the involved core-shell structure formation mechanism is also discussed. The ternary Pt/Au@Pd e G composites can also be synthetized by the subsequent Pt doping. The catalytic performance of Au@Pd e G composites toward methanol electro-oxidation in acidic media is investigated. The results show that Au@Pd e G composites exhibit higher catalytic activity, better stability and stronger tolerance to CO poisoning than Pd-G and Au-G counterparts.
Nanting Li，Shaochun Tang，Xiangkang Meng
Institute of Materials Engineering,National Laboratory of Solid State Microstructures,College of Engineering and Applied Sciences,Nanjing University
摘 要：In this paper, we report a simple one-step thermal reducing method for synthesis of bimetallic Au@Pd nanoparticles with core-shell structures on the graphene surface. This new type of Au@Pd e G composites is characterized by transmission electron microscopy, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. It is found that Au@Pd nanoparticles with an average diameter of 11 nm are well dispersed on the graphene surface, and the Au core quantity as well as the Pd shell thickness can be quantitatively controlled by loading different amounts of metallic precursors, and the involved core-shell structure formation mechanism is also discussed. The ternary Pt/Au@Pd e G composites can also be synthetized by the subsequent Pt doping. The catalytic performance of Au@Pd e G composites toward methanol electro-oxidation in acidic media is investigated. The results show that Au@Pd e G composites exhibit higher catalytic activity, better stability and stronger tolerance to CO poisoning than Pd-G and Au-G counterparts.
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