Palladium–nickel materials as cathode electrocatalysts for alkaline fuel cells

J.C. Calderon, Veronica Celorrio, M.J. Nieto-Monge, David Fermin, J.I. Pardo, R Moliner, M. J. Lazaro

Research output: Contribution to journalArticle (Academic Journal)peer-review

17 Citations (Scopus)
224 Downloads (Pure)

Abstract

In this work, Pd-Ni catalysts supported on carbon nanofibers were synthesized, with metal contents and Pd:Ni atomic ratios close to 25 wt. % and 1:2, respectively. Previously, the carbon nanofibers were chemically treated, in order to create surface oxygen and/or nitrogen groups. The synthesized catalysts displayed low crystallinity degree and high dispersion on carbon supports, especially in those with surface functional groups. Oxygen reduction reaction (ORR) was studied by rotating ring-disk electrode (RRDE) techniques. When the kinetic current is normalized by the mass of Pd present in the electrode, higher activities were obtained for the synthesized materials in comparison with the activity observed for a commercial Pd/C E-TEK catalyst. Some differences are reported for the different materials under study, mainly dependent on the presence of oxygen surface groups on the carbon support. In light of the results, we can propose the synthesized catalysts as possible candidates for cathodes in alkaline direct methanol fuel cells.
Original languageEnglish
Pages (from-to)22538–22546
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume41
Issue number47
Early online date16 Sep 2016
DOIs
Publication statusPublished - 21 Dec 2016

Keywords

  • Pd–Ni catalysts
  • Alkaline medium
  • Oxygen reduction
  • Carbon nanofibers
  • Hydrogen peroxide production

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