Durable tungsten carbide support for Pt-based fuel cells cathodes

Oran Lori, Shmuel Gonen, Omree Kapon, Lior Elbaz

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

In an effort to develop durable, corrosion-resistant catalyst support materials for polymer electrolyte fuel cells, modified polymer-assisted deposition method was used to synthesize tungsten carbide (WC, WC1x), which was later used as a support material for Pt-based oxygen reduction reaction catalyst, as an alternative for the corrosion-susceptible, carbon supports. The Pt-deposited tungsten carbide’s corrosion-resistance, oxygen reduction reaction electrocatalysis, and durability were studied and compared to that of Pt/C. Bulk free carbon was found to be absent from the ceramic matrix which had particle size in the range of 2−25 nm. Tungsten carbide support appears to enhance the oxygen reduction activity on Pt, showing an increase in mass activity (nearly 2-fold at 0.85 V vs RHE) and specific activity (more than 7 times higher), alongside decrease in overpotential, in comparison to Pt/C. A significant increase in durability was also observed with the tungsten carbide-based system.

Original languageEnglish
Pages (from-to)8315-8323
Number of pages9
JournalACS applied materials & interfaces
Volume13
Issue number7
DOIs
StatePublished - 24 Feb 2021

Bibliographical note

Publisher Copyright:
© 2021 American Chemical Society.

Keywords

  • Ceramic materials
  • Corrosion-resistance
  • Fuel-cells
  • ORR
  • Tungsten carbide

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