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Synthesis and Characterization of PtSn/Carbon and Pt3Sn/Carbon Nanocomposites as Methanol Electrooxidation Catalysts

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Two Pt-Sn/vulcan carbon nanocomposites containing nanoclusters of PtSn (niggliite) and Pt3Sn highly dispersed on a carbon powder support have been prepared using Pt(SnPh2Cl)(PPh3)2(Ph) or {Pt3[-(PPh2)2CH2]3(3-SnF3) (3-CO)}[PF6] as single-source precursors of metal alloy. PtP2 or Pt metal is also present as a secondary phase. Bimetallic Pt-Sn nanoclusters with an average diameter of 5-8 nm are formed at a total metal loading of ca. 15 wt %. Evaluation of both Pt-Sn/C nanocomposites as electrooxidation catalysts in a direct methanol fuel cell gives fuel cell performances comparable to that expected for Pt-Sn catalysts prepared by more conventional methods.
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Keywords: BIMETALLIC NANOPARTICLES; METHANOL OXIDATION; PT-SN/CARBON NANOCOMPOSITES

Document Type: Research Article

Affiliations: 1: Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA 2: Department of Chemical & Environmental Engineering, Illinois Institute of Technology, 10 West 33rd Street, Chicago, Illinois 60616, USA 3: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA

Publication date: 2002-02-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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