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- Title
Electrochemical characterization of a porous Pt nanoparticle 'Nanocube-Mosaic' prepared by a modified polyol method with HCl addition.
- Authors
Jalem, Randy; Koike, Ryosuke; Yang, Yong; Nakayama, Masanobu; Nogami, Masayuki
- Abstract
Porous and single crystalline platinum (Pt) nanoparticles (NPs) have been successfully synthesized by reduction of HPtCl·6HO and then investigated by optical spectroscopy and transmission electron microscopy. HPtCl·6HO was reduced using ethylene glycol in the presence of polyvinylpyrrolidone under highly acidic conditions (pH < 1) to form single crystalline Pt particles about 5 nm in size. These particles were then stacked via {100} facets, forming 50-nm length porous nanocubes with a mosaic structure. The porous Pt NPs exhibited excellent catalytic properties for methanol oxidation. In particular, the electrochemical surface area was ∼63 m/g, five times higher than that for non-porous Pt NPs prepared using a conventional method. We suggest that the high catalytic activity of porous Pt NPs is due to a combination of the crystalline structure having exposed {100} facets and a porous morphology. [InlineMediaObject not available: see fulltext.]
- Publication
Nano Research, 2011, Vol 4, Issue 8, p746
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-011-0131-z