Oxygen Reduction Activity of Vapor-Grown Platinum Nanotubes

Alexander B. Papandrew, Robert W. Atkinson, Gabriel A. Goenaga, Thomas A. Zawodzinski, Shyam S. Kocha, Jason W. Zack, Bryan S. Pivovar, Thomas A. Zawodzinski, Shyam S. Kocha, Bryan S. Pivovar, Gabriel A. Goenaga, Thomas A. Zawodzinski

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29 Scopus Citations

Abstract

Supportless platinum nanotubes (PtNTs) were synthesized by the decomposition of platinum acetylacetonate vapor within anodic alumina templates at 210° C. As synthesized, the nanotubes are nanoparticulate aggregates composed of Pt crystallites approximately 3 nm in diameter and with a range of lengths from 1 μ m to 20 μ m. Annealing treatments result in crystallite growth and morphological evolution of the tubular nanostructures including the development of nanoscale porosity. In rotating disk electrode measurements carried out in0.1M HC1O4, porous PtNTs annealed at 500°C exhibited a specific activity for oxygen reduction of 2390 ± 423 μ A/cm2pt at 0.9 V, comparable to bulk polycrystalline Pt. The electrochemical surface area of the annealed structures was a relatively low 10 m2/g, resulting in a moderate overall mass activity of 240 ± 41 mA/mg pt.

Original languageAmerican English
Pages (from-to)F848-F852
JournalJournal of the Electrochemical Society
Volume160
Issue number8
DOIs
StatePublished - Jan 2013

NREL Publication Number

  • NREL/JA-5900-60768

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