期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 11, 期 5, 页码 954-957出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.02.033
关键词
Functionalized graphene sheets; Fuel cell; Pt; Cathode durability
资金
- US Department of Energy (DOE) [DE-AC05-76RL01830]
- ARO/MURI [W911NF-04-1-0170]
Electrocatalysis of oxygen reduction using Pt nanoparticles supported on functionalized graphene sheets (FGSs) was studied. FGSs were prepared by thermal expansion of graphite oxide. Pt nanoparticles with average diameter of 2 nm were uniformly loaded on FGSs by impregnation methods. Pt-FGS showed a higher electrochemical surface area and oxygen reduction activity with improved stability as compared with the commercial catalyst. Transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical characterization suggest that the improved performance of Pt-FGS can be attributed to smaller particle size and less aggregation of Pt nanoparticles on the functionalized graphene sheets. Published by Elsevier B.V.
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