One-step chemical vapor synthesis of Ni/graphene nanocomposites with excellent electromagnetic and electrocatalytic properties

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• 作者：Yu Cao^a ; Qingmei Su^a ; Renchao Che^c ; Gaohui Du^a ; ^b ; ^{gaohuidu@zjnu.edu.cn} ; ^{gaohuidu@gmail.com} ; Bingshe Xu^b
• 关键词：Graphene sheet ; Nanocomposite ; Chemical vapor deposition ; Electron microscopy ; Microwave absorbing performance
• 刊名：Synthetic Metals
• 出版年：2012
• 期刊代码：77_03796779
• 类别：ph
• 出版时间：July, 2012
• 卷：162
• 期：11-12
• 页码：968-973
• 文件大小：1149 K

摘要

We present the first report concerning the one-step synthesis of Ni/graphene nanocomposites via a substrate-free, atmospheric-pressure chemical vapor deposition process. The as-grown thin graphene sheets are produced in large scale with the thickness of 鈭? nm, and they are decorated with numerous Ni/graphene core-shell nanoparticles. The nucleation and growth mechanism of the composite has been proposed based on careful transmission electron microscopy analysis. Ni₃C domains within Ni nanoparticles have been observed, indicating a transformation between nickel and nickel carbide during graphene growth owing to the diffuse and precipitation of carbon atoms. Moreover, such Ni/graphene nanocomposites exhibit excellent microwave absorption and electrochemical ethanol sensing properties. This study opens up a new synthesis route for graphene-based materials.