Palladium Coated Copper Nanowires as a Hydrogen Oxidation Electrocatalyst in Base

Shaun Alia, Yushan Yan

Research output: Contribution to journalArticlepeer-review

38 Scopus Citations

Abstract

Palladium (Pd) nanotubes are synthesized by the spontaneous galvanic displacement of copper (Cu) nanowires, forming extended surface nanostructures highly active for the hydrogen oxidation reaction (HOR) in base. The synthesized catalysts produce specific activities in rotating disk electrode half-cells 20 times greater than Pd nanoparticles and about 80% higher than polycrystalline Pd. Although the surface area of the Pd nanotubes was low compared to conventional catalysts, partial galvanic displacement thrifted the noble metal layer and increased the Pd surface area. The use of Pd coated Cu nanowires resulted in a HOR mass exchange current density 7 times greater than the Pd nanoparticles. The activity of the Pd coated Cu nanowires further nears Pt/C, producing 95% of the mass activity.

Original languageAmerican English
Pages (from-to)F849-F853
JournalJournal of the Electrochemical Society
Volume162
Issue number8
DOIs
StatePublished - 2015

Bibliographical note

Publisher Copyright:
© The Author(s) 2015.

NREL Publication Number

  • NREL/JA-5900-64906

Keywords

  • catalysts
  • fuel cells
  • hydrogen oxidation
  • hydroxide exchange
  • nanowires

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