Palladium/nickel bifunctional electrocatalyst for hydrogen oxidation reaction in alkaline membrane fuel cell

Maria Alesker, Miles Page, Meital Shviro, Yair Paska, Gregory Gershinsky, Dario R. Dekel, David Zitoun

Research output: Contribution to journalArticlepeer-review

138 Scopus citations

Abstract

Investigation of the hydrogen oxidation reaction (HOR) in alkaline media has been pursued in the past few years side by side with the development of alkaline membrane fuel cells (AMFCs), also called anion exchange membrane fuel cells (AEM-FCs). In this communication, we present the synthesis, electrochemistry and AMFC test of a platinum-free HOR catalyst. The anode catalyst is prepared by growing palladium nanoparticles onto nanoparticles of an oxophilic metal (nickel), resulting in nano-dispersed, interconnected crystalline phases of Ni and Pd. When used in the anode of a hydrogen/air AMFC, such Pd/Ni catalyst exhibits high HOR activity, resulting in record high performance for a platinum-free AMFC (0.4 A cm-2 at 0.6 V vs RHE). The enhancement of HOR catalytic activity vs. that observed at Pd (or Ni) alone is revealed directly in rotating disc electrode tests of this Pd/Ni catalyst that shows a significant negative shift (200 mV) of the onset potential for the HOR current vs. the case of Pd.

Original languageEnglish
Pages (from-to)332-339
Number of pages8
JournalJournal of Power Sources
Volume304
DOIs
StatePublished - 1 Feb 2016

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.

Keywords

  • AMFC
  • Alkaline
  • Fuel cells
  • HOR
  • Hydrogen oxidation reaction
  • Nanoparticles

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