Pd-Pt nanostructures on carbon nanofibers as an oxygen reduction electrocatalyst

Andres Godinez-Garcia, Dominic F Gervasio

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A new oxygen reduction catalyst is made of Pd and Pt nanostructures (Pd-Pt) supported on a herring-bone arrangement of carbon nanofibers (NFs) and is synthesized in one pot by the sequential reduction of Pd2+and Pt4+in aqueous chloride solution with ethylene glycol and then adding the carbon NF to precipitate the catalyst. The exchange current density for the oxygen reduction reaction (ORR) on Pd-Pt is 1.44 × 10-4mA cm-2versus 1.41 × 10-4mA cm-2for pure Pt as determined using a thin-film rotating disk electrode (TF-RDE) method. A single cell hydrogen anode and oxygen cathode fuel cell in which the cathode is catalyzed with Pd-Pt gives a performance as good as or better than with a commercial Pt catalyst in the cathode for the same total metal loading, 0.5 mgmetalcm-2. This shows the catalyst made of Pd-Pt supported on carbon NF is a low cost alternative to Pt on carbon, because it gives the same or better activity with less Pt.

Original languageEnglish (US)
Pages (from-to)42009-42013
Number of pages5
JournalRSC Advances
Volume4
Issue number79
DOIs
StatePublished - 2014

Fingerprint

Carbon nanofibers
Electrocatalysts
Nanostructures
Oxygen
Catalysts
Cathodes
Ethylene Glycol
Rotating disks
Ethylene glycol
Chlorides
Fuel cells
Precipitates
Hydrogen
Ion exchange
Anodes
Bone
Current density
Carbon
Metals
Thin films

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Pd-Pt nanostructures on carbon nanofibers as an oxygen reduction electrocatalyst. / Godinez-Garcia, Andres; Gervasio, Dominic F.

In: RSC Advances, Vol. 4, No. 79, 2014, p. 42009-42013.

Research output: Contribution to journalArticle

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