Au integrated AgPt nanorods for the oxygen reduction reaction in proton exchange membrane fuel cells

Elok Fidiani, Gnanavel Thirunavukkarasu, Yang Li, Yu-Lung Chiu, Shangfeng Du

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Abstract

The development of new electrode fabrication approaches from highly active electrocatalysts to replace the state-of-the-art Pt/C is most desirable for enhancing power performance and durability in proton exchange membrane fuel cells. However, the deployment of advanced, often shape-controlled Pt alloy electrocatalysts in actual electrodes remains challenging due to their small quantities in preparation and poor power performance in operating fuel cells. In this study, a new electrocatalyst approach is presented for Au integrated one-dimensional AgPt alloy nanorods. The atom arrangement is tuned through precisely controlling the metal ion reduction procedure to improve the catalyst activity. With 5 at% Au, nanorods with an average length of 20 nm and diameter of 3-4 nm are achieved. The test of Au-AgPt nanorods as cathode catalysts shows 1.2-fold higher fuel cell power density than that for commercial Pt/C catalysts, and a lower decline rate of 39.63% than 44.19% after an accelerated degradation test.

Original languageEnglish
Pages (from-to)5578-5587
Number of pages10
JournalJournal of Materials Chemistry A
Volume9
Issue number9
Early online date18 Jan 2021
DOIs
Publication statusPublished - 7 Mar 2021

Bibliographical note

Funding Information:
This work is part of E. Fidiani PhD studentship sponsored by the Indonesian Endowment Fund for Education (LPDP) and the EPSRC Centre for Doctoral Training in Fuel Cells and their Fuels (EP/L015749/1).

Publisher Copyright:
© The Royal Society of Chemistry 2021.

Keywords

  • proton exchange membrane fuel cell (PEMFC)
  • PEMFC
  • Oxygen reduction reaction (ORR)
  • Electrocatalyst
  • Nanorod
  • One dimensional
  • 1D
  • ORR
  • Electrode
  • Pt
  • Alloy
  • PtAg
  • Au
  • PtAgAu

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