Exfoliated Graphene Separated by Platinum Nanoparticles

被引：1051

作者：

Si, Yongchao ^{[1
]}

Samulski, Edward T. ^{[1
]}

机构：

[1] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 21期

关键词：

D O I：

10.1021/cm801356a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 grpahene morphology derived from drying aqueous dispersions of platimum nanoparticles adhered to graphene. Platinum nanoparticles with diameters spanning several nanomaters 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 cyrstallites 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.

引用

页码：6792 / 6797

页数：6

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