Pd-Fe nanoparticles as electrocatalysts for oxygen reduction

Min-Hua Shao; Kotaro Sasaki; Radoslav R Adzic

doi:10.1021/ja060167d

Pd-Fe nanoparticles as electrocatalysts for oxygen reduction

J Am Chem Soc. 2006 Mar 22;128(11):3526-7. doi: 10.1021/ja060167d.

Authors

Min-Hua Shao¹, Kotaro Sasaki, Radoslav R Adzic

Affiliation

¹ Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, USA.

PMID: 16536519
DOI: 10.1021/ja060167d

Abstract

We have synthesized new electrocatalysts for the O2 reduction reaction that does not contain Pt. They consist of carbon-supported Pd-Fe alloys and have very high oxygen reduction. The nanoparticles with a Pd:Fe molar ratio of 3:1 (Pd3Fe/C) show a higher mass activity than that of commercial Pt/C. The surface-specific activity of the Pd-Fe alloys is related to the Pd-Pd bond distance: the shorter the bond distance, the higher the activity. This new class of electrocatalysts promises to alleviate some major problems of existing fuel cell technology by simultaneously decreasing materials cost and enhancing performance.