期刊
JOURNAL OF POWER SOURCES
卷 277, 期 -, 页码 268-276出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.11.117
关键词
Nitrogen doped-Graphene; Platimum nanoparticles; Electrocatalysis; Oxygen reduction; Anodic fuels oxidation
资金
- Iranian Nanotechnology Initiative and the Research Office of the University of Kurdistan
Due to exceptional electronic properties of graphene (Gr) and nitrogen doped graphene (N-Gr), they are considered as superior supporting platforms for novel metal nanoparticle decorations. Here, we report, a novel one-step electrochemical method for synthesis of Nitrogen-doped graphene sheets uniformly decorated with platinum nanoparticles (Pt/N-Gr). A graphite rod and platinum wire are respectively used for graphene and platinum nanoparticles production. The potential is cycled from -3V to +3V in acetonitrile solution as a nitrogen dopant source. By increasing the number of cycles the nitrogen-doped graphene/platinum nanoparticles composite is generated. After heat-treating the composite is characterized with various techniques such as FTIR, Raman, XPS, SEM and TEM. The electrocatalytic activity of the prepared composite toward the reduction of O-2 and the oxidation of usual anodic fuels such as methanol, ethanol, hydrazine and formic acid is investigated using cyclic voltammetry technique. In comparison to commercial platinum/carbon, the onset potentials and the current densities for both O-2 reduction and fuels oxidation are remarkably improved. Furthermore, the modified electrode by this composite shows good long-term stability and poisoning tolerance. (C) 2014 Elsevier B.V. All rights reserved.
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