Journal
NANO LETTERS
Volume 10, Issue 8, Pages 2806-2811Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl100718k
Keywords
Platinum; nanowires; electrocatalysis; oxygen reduction reaction
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Funding
- U.S. Department of Energy [DE-AC02-98CH10886]
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
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We report on the synthesis. characterization, and electrocatalytic performance of ultrathin Pt nanowires with a diameter of less than 2 nm. An acid-wash protocol was employed in order to yield highly exfoliated, crystalline nanowires with a diameter of 1.3 +/- 0.4 nm. The electrocatalytic activity of these nanowires toward the oxygen reduction reaction was studied in relation to the activity of both supported and unsupported Pt nanoparticles as well as with previously synthesized Pt nanotubes. Our ultrathin, acid-treated, unsupported nanowires displayed an electrochemical surface area activity of 1.45 mA/cm(2), which was nearly 4 times greater than that of analogous, unsupported platinum nanotubes and 7 times greater than that of commercial supported platinum nanoparticles.
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