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Exfoliated Graphene Separated by Platinum Nanoparticles
Abstract
Aggregation of isolated graphene sheets during drying graphene dispersions leads to a loss of its ultrahigh surface area advantage as a two-dimensional nanomaterial. We report a metal nanoparticle-graphene composite with a partially exfoliated graphene morphology derived from drying aqueous dispersions of platinum nanoparticles adhered to graphene. Platinum nanoparticles with diameters spanning several nanometers are adhered to graphene by a chemical route involving the reduction of metal precursors in a graphene dispersion. Face-to-face aggregation of graphene sheets is arrested by 3−4 nm fcc Pt crystallites on the graphene surfaces, and in the resulting jammed Pt−graphene composite, the Pt acts as spacers resulting in mechanically exfoliated, high-surface-area material of potential interest for supercapacitors and fuel cells.
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Metadata
- Authors
- Si, Y., & Samulski, E. T.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-10-15
- Volume
- 20
- Issue
- 21
- Pages
- 6792-6797
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W1981517819
- Cited by
- 1,126
- References
- 5
- FWCI
- 33.35
- Type
- journal article
- Language
- en
- Open access
- closed
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