Benchmarking Pt and Pt-lanthanide sputtered thin films for oxygen electroreduction: fabrication and rotating disk electrode measurements

Eleonora Zamburlini, Kim Degn Jensen, Ifan E.L. Stephens, Ib Chorkendorff, Maria Escudero Escribano

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Abstract

Platinum-lanthanide alloys are very promising as active and stable catalysts for the oxygen reduction reaction (ORR) in low-temperature fuel cells. We have fabricated Pt and Pt5Gd metallic thin films via (co-)sputtering deposition in an ultra-high vacuum (UHV) chamber. The electrochemical ORR activity, stability, as-well as chemical composition and crystallographic structure of Pt5Gd thin film catalysts have been investigated using a combination of electrochemical measurements, X-ray photoemission spectroscopy (XPS) and X-ray diffraction (XRD) techniques. We describe the measurement procedures, with the aim of benchmarking electrochemical characterization of Pt-based thin film catalysts for ORR. Pt5Gd thin films present an activity enhancement by a factor of 4.5 and 2.5 over polycrystalline Pt and Pt thin films, respectively.
Original languageEnglish
JournalElectrochimica Acta
Volume247
Pages (from-to)708-721
Number of pages14
ISSN0013-4686
DOIs
Publication statusPublished - 2017

Keywords

  • Benchmarking
  • Electrocatalysis
  • Oxygen Reduction Reaction
  • Pt-Alloys
  • Rotating Disk Electrode
  • Sputtering
  • Thin Films

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