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Issue 2, 2013
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A facile synthesis of platinum nanoparticle decorated graphene by one-step γ-ray induced reduction for high rate supercapacitors

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Abstract

A facile method has been developed to synthesize a high-quality platinum nanoparticle (PtNP) decorated graphene via one-step γ-ray induced reduction of graphite oxide (GO) and chloroplatinic acid at room temperature. GO and Pt(IV) precursor salt could be co-reduced by the electrons generated from the radiolysis of ethylene glycol under γ-ray irradiation. The synchronous reduction of the metal precursor and regulation of pH greatly increased the ratio of C/O in the reduced GO (RGO). PtNPs with an average diameter of 1.8 nm were uniformly dispersed on the surface of RGO sheets. The as-prepared PtNP–RGO composites as supercapacitor electrodes displayed a specific capacitance of 154 F g−1 at a current density of 0.1 A g−1 and the value retained as high as 72.3% at 20 A g−1 which was significantly enhanced compared to 16.2% capacity retention of RGO prepared by the same method. The investigation of electrochemical performances suggests that PtNPs play an important role in enhancing supercapacitor performance with high rate capability by accelerating the electron transfer and increasing the electrochemical active surface area of RGO.

Graphical abstract: A facile synthesis of platinum nanoparticle decorated graphene by one-step γ-ray induced reduction for high rate supercapacitors

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Publication details

The article was received on 30 Aug 2012, accepted on 15 Oct 2012 and first published on 16 Oct 2012


Article type: Paper
DOI: 10.1039/C2TC00078D
Citation: J. Mater. Chem. C, 2013,1, 321-328

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    A facile synthesis of platinum nanoparticle decorated graphene by one-step γ-ray induced reduction for high rate supercapacitors

    Q. Zhang, Y. Zhang, Z. Gao, H. Ma, S. Wang, J. Peng, J. Li and M. Zhai, J. Mater. Chem. C, 2013, 1, 321
    DOI: 10.1039/C2TC00078D

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