期刊
ELECTROCHIMICA ACTA
卷 56, 期 17, 页码 6008-6013出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.04.099
关键词
Palladium; Graphene nanocomposite; Sonoelectrochemistry; Chlorophenols; Electrocatalysis
资金
- National Natural Science Foundation of China [20821063]
- 973 Program [2011CB 933502]
- International S&T Cooperation Projects of China [2010DFA42060]
- Natural Science Foundation of Anhui Educational Committee [KJ2008B188]
A novel electrochemical sensor for chlorophenols was fabricated by using the Pd-graphene nanocomposite and ions liquid. The Pd-graphene nanocomposite was prepared via a sonoelectrochemical route, and the possible formation mechanism was proposed. Transmission electron microscopy, scanning electron microscopy. X-ray diffraction and Raman spectrum were used for the characterization of structure and morphology of the nanocomposite. The experimental results showed that Pd nanospheres comprised of small Pd nanoparticles were uniformly attached on graphene sheets. The electrocatalytic properties were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV), which indicated that the Pd-graphene nanocomposite had high activity for chlorophenol oxidation. Herein, 2-chlorophenol was selected as the model molecules. The results showed that graphene played an important role in the fabrication of the chlorophenols sensor. The nanocomposite with large electrochemical active surface led to the excellent electrocatalytic activity, and ionic liquid further enhanced the catalytic activity of Pd-graphene for chlorophenols. (C) 2011 Elsevier Ltd. All rights reserved.
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