FePt Nanoparticles Assembled on Graphene as Enhanced Catalyst for Oxygen Reduction Reaction

Guo, S, Sun S.  2012.  FePt Nanoparticles Assembled on Graphene as Enhanced Catalyst for Oxygen Reduction Reaction. Journal of the American Chemical Society. 134(5):2492-2495.

Abstract

Seven-nanometer FePt nanoparticles (NPs) were synthesized and assembled on graphene (G) by a solution-phase self-assembly method. These G/FePt NPs were a more active and durable catalyst for oxygen reduction reaction (ORR) in 0.1 M HClO4 than the same NPs or commercial Pt NPs deposited on conventional carbon support. The G/FePt NPs annealed at 100 °C for 1 h under Ar + 5% H2 exhibited specific ORR activities of 1.6 mA/cm2 at 0.512 V and 0.616 mA/cm2 at 0.557 V (vs Ag/AgCl). As a comparison, the commercial Pt NPs (2–3 nm) had specific activities of 0.271 and 0.07 mA/cm2 at the same potentials. The G/FePt NPs were also much more stable in the ORR condition and showed nearly no activity change after 10 000 potential sweeps. The work demonstrates that G is indeed a promising support to improve NP activity and durability for practical catalytic applications.

IMNI Faculty Authors

Profile Photo Shouheng Sun
Co-Director, Institute for Molecular and Nanoscale Innovation
Professor, Department of Chemistry