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- Kwak, Ja Hun
- Molecular Catalysis Lab.
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Enhanced activity and stability of Pt catalysts on functionalized graphene sheets for electrocatalytic oxygen reduction
- Alternative Title
- Enhanced activity and stability of Pt catalysts on functionalized graphene sheets for electrocatalytic oxygen reduction
- Author(s)
- Kou, Rong, Shao, Yuyan, Wang, Donghai, Engelhard, Mark H., Kwak, Jahun, Wang, Jun, Viswanathan, Vilayanur V., Wang, Chongmin, Lin, Yuehe, Wang, Yong, Aksay, Ilhan A., Liu, Jun
- Issued Date
- 2009-05
- Citation
- ELECTROCHEMISTRY COMMUNICATIONS, v.11, no.5, pp.954 - 957
- Abstract
- 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
- Publisher
- ELSEVIER SCIENCE INC
- ISSN
- 1388-2481
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