Issue 79, 2014

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

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 × 10−4 mA cm−2 versus 1.41 × 10−4 mA cm−2 for 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 mgmetal cm−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.

Graphical abstract: Pd–Pt nanostructures on carbon nanofibers as an oxygen reduction electrocatalyst

Article information

Article type
Paper
Submitted
01 Jul 2014
Accepted
29 Aga 2014
First published
29 Aga 2014

RSC Adv., 2014,4, 42009-42013

Author version available

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

A. Godinez-Garcia and D. F. Gervasio, RSC Adv., 2014, 4, 42009 DOI: 10.1039/C4RA06507G

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